Exhibit 99.1

      CIPHERGEN REPORTS FINANCIAL RESULTS FOR THE FOURTH QUARTER AND FISCAL
                                    YEAR 2004

    Results Reflect Sale of BioSepra Operation, Including $18.5 Million Gain

    FREMONT, Calif., Feb. 17 /PRNewswire-FirstCall/ -- Ciphergen Biosystems,
Inc. (Nasdaq: CIPH) today announced financial results for the fourth quarter and
full year ended December 31, 2004. Because of the sale of Ciphergen's BioSepra
chromatography business to Pall Corporation on November 30, 2004, the financial
results discussed herein reflect the BioSepra business as a discontinued
operation. For the quarter ended December 31, 2004, total revenue decreased 13%
to $10.1 million, as compared to $11.6 million in the fourth quarter of 2003;
but total revenue increased 19% sequentially as compared to the third quarter of
2004. The net loss from continuing operations was $7.6 million in the fourth
quarter of 2004 as compared to $7.4 million in the fourth quarter of 2003 and
$9.6 million in the third quarter of 2004. During the fourth quarter of 2004,
Ciphergen recorded net income from discontinued operations of $17.9 million, of
which $18.5 million represented a gain from the sale of BioSepra. Because of
this gain, Ciphergen's net income for the fourth quarter of 2004 was $10.3
million as compared to a net loss of $6.7 million for the comparable quarter of
2003.

    For the fiscal year 2004, total revenue decreased 8% to $40.2 million, as
compared to $43.6 million in 2003. The net loss from continuing operations for
2004 was $36.9 million as compared to $38.9 million in 2003; 2003 results
included a non-recurring expense of $7.3 million related to a litigation
settlement. Ciphergen's net loss for 2004 was $19.8 million as compared to a net
loss of $36.7 million in 2003; 2004 results included net income from
discontinued operations of $17.1 million.

    At December 31, 2004, the Company's cash and investments were $37.6 million.
Total long term debt totaled $28.5 million, of which $28.1 million was
convertible debt.

    Financial Outlook for 2005
    The Company provides the following financial guidance for 2005:

     *    Revenue. Ciphergen expects total 2005 revenue of approximately $44- 48
          million. The Company expects that revenues for the first quarter of
          2005 will be approximately $8-9 million, with increasing quarterly
          revenue thereafter in 2005.
     *    Gross Margin. The Company expects that its gross margin will be in the
          65-68% range during 2005.
     *    Net Loss. Ciphergen expects that its net loss in 2005 will be
          approximately $21-25 million. The Company's net loss per quarter is
          expected to decline over the year, driven by the anticipated growth in
          revenue and steps taken to reduce operating expenses in the Biosystems
          Division, partially offset by increased investment in the Diagnostics
          Division.

    "We believe that our new product introductions and the results that
prestigious laboratories are achieving through use of ProteinChip(R) technology
is creating growing acceptance by the market and we anticipate renewed revenue
growth to result in 2005," commented William E. Rich, President and CEO of
Ciphergen. "We are also looking forward to achieving major milestones in our
Diagnostics Division during the year, including commercialization partnerships
as well as the potential launch of our first clinical diagnostic test."



    Recent Highlights

     *    Strategic Sale of BioSepra Chromatography Business and Collaboration
          with Pall.  On November 30, 2004, Ciphergen completed the sale of
          the BioSepra chromatography business to Pall Corporation for
          approximately $32 million and also entered into a collaboration with
          Pall for process proteomics, based on the combination of Ciphergen's
          ProteinChip technology and BioSepra's leading chromatography
          products.  Ciphergen also retains certain rights to access
          BioSepra's chromatography sorbent technology for manufacture, use
          and sale in the research and diagnostic markets.

     *    Biosystems Progress.
          *    New Product Introductions.  In the third quarter of 2004,
               Ciphergen launched the ProteinChip System, Series 4000 and
               Pattern Track(TM) Process which provides the biomarker
               proteomics market with the only complete system solution to
               rapidly translate biomarker discovery to high value assays at
               the benchtop.  At the PepTalk meeting in December, Ciphergen
               presented promising results using our Deep Proteome(TM) sample
               preparation family of products including Equalizer Beads(TM);
               these products potentially provide a breakthrough in detection
               of low abundant proteins, a major problem today in proteomics.
               We anticipate commencing customer shipments of our Deep
               Proteome products during 2005.

          *    Pharma Biomarker Proteomics.  The ProteinChip system is
               currently being evaluated by the majority of major
               pharmaceutical companies to identify biomarkers of drug safety
               and efficacy to monitor drug treatment and reduce late-stage
               attrition of compounds.  Advances in the analysis and
               identification of low abundance proteins through the
               implementation of Deep Proteome products should further enable
               the elucidation of biological pathways perturbed by drug
               treatment and even reveal new drug targets.  As a separate
               pharma initiative, discussions are currently underway with
               multiple pharmaceutical companies to partner in the field of
               Alzheimer's Disease based on promising discovery work conducted
               by our Biomarker Discovery Center(R) scientists and
               collaborators.

          *    Clinical Proteomics Research. There is a growing list of
               customers using ProteinChip Systems for disease biomarker
               discovery and assay development applications with over 600
               systems now sold worldwide, many with multiple users or
               applications per system.  For example, Alzheimers (>100 users
               or applications), prostate cancer (>100), ovarian cancer
               (>130), breast cancer (>130), colon cancer (>40), other cancers
               (>85), cardiovascular diseases (>100), HIV/AIDS (>135),
               infectious diseases (>95), diabetes (>55), kidney disease (>45)
               and arthritis (>15).



          *    Publication Progress.  This broad use of ProteinChip technology
               led to 122 scientific papers in 2004; this represents a 60%
               increase in publications over the number of publications in
               2003 and brings our total publications list to over 350.
               Ciphergen scientists and/or our customers presented 48 papers
               or posters at the 2004 American Association for Cancer Research
               meeting, among other major disease-based conferences.  This
               growing list of successes continues to feed our systems growth
               and potential diagnostics pipeline and validates our Pattern
               Track process and ProteinChip technology.

     *    Diagnostics Progress. During 2004, Ciphergen continued its pioneering
          efforts in translating the discovery and validation of biomarkers into
          both research use and commercial clinical diagnostic and theranostic
          assays. The Company believes that continued progress in this area will
          further validate its competitive advantage as well as produce new
          diagnostic business opportunities.

          *    Ovarian Cancer Program.  Ciphergen's Biomarker Discovery Center
               scientists and investigators from several leading institutions
               published in Cancer Research in August 2004 the use of
               Ciphergen's ProteinChip System to discover three protein
               biomarkers that, when combined, form the basis of a potential
               clinical assay designed to detect stage I/II ovarian cancer.
               This study examined 503 patients and employed a multi-
               institutional study design, with both cross-validation and
               independent validation of the individual biomarkers as well as
               of the multi-marker pattern. The pattern of three biomarkers
               was able to diagnose early stage (I/II) ovarian cancer with 74%
               sensitivity at 97% specificity.

               In addition, Ciphergen and European collaborators presented at
               the International Gynecologic Cancer Society in Edinburgh results
               from a study suggesting that two of these ovarian cancer markers
               may be useful for multiple clinical applications in addition to
               initial diagnosis, such as monitoring response to therapy and for
               recurrence.

               Finally, Ciphergen and the M.D. Anderson Cancer Center recently
               entered into a collaboration agreement involving analysis of
               clinical samples provided by M. D. Anderson for ovarian cancer
               using Ciphergen's Deep Proteome and Pattern Track suite of
               proteomics tools. This work will address multiple clinical
               questions, including validation of markers described in the
               Cancer Research article, discovery of markers that distinguish
               ovarian cancer from other gynecologic masses and prediction of
               treatment response. Ciphergen has exclusive rights to license
               discoveries made during the course of this collaboration.

     *    Milestones Demonstrating Utility of ProteinChip System as a
          Potential Diagnostic Platform.



               *    In January 2005, the NCI's Early Detection Research Network
                    published a paper in Clinical Chemistry demonstrating
                    excellent reproducibility of SELDI-TOF-MS in a multi-site
                    NCI sponsored clinical study, a pre-requisite validation for
                    a clinical diagnostic assay platform.

               *    The NCI's Clinical Proteomics Research Laboratory
                    presented results of a study of ovarian cancer sera with
                    total inter-day precision from 6-12%, based on the use of
                    the ProteinChip System, PBS IIc at the 2005 annual meeting
                    of the Association for Laboratory Automation (ALA).  An
                    independent study presented at the ALA meeting by
                    Ciphergen scientists demonstrated precision of
                    approximately 10% using the ProteinChip System, Series
                    4000.

     *    Expanding Pipeline of Potential Diagnostic Assays.  Ciphergen's
          Biomarker Discovery Centers and research scientists, in
          collaboration with leading translational researchers worldwide,
          continue to use Ciphergen's Pattern Track Process to discover
          disease-associated protein biomarkers that form the basis of
          potential multimarker assays designed to address a variety of
          clinical questions in cancer, cardiovascular, neurological and
          infectious diseases.

               *    Scientists at the Children's Hospital Boston, working in
                    collaboration with scientists from Ciphergen, presented
                    results at the American Society for Hematology 46th Annual
                    Meeting in December suggesting proteomic analysis of
                    circulating platelets can potentially be useful for early
                    cancer diagnosis.

               *    The Johns Hopkins University School of Medicine and
                    Ciphergen renewed their agreement to discover and validate
                    biomarkers for the detection of early stage breast, ovarian,
                    pancreatic and prostate cancer. The collaboration has
                    resulted in publications in journals such as Cancer
                    Research, Clinical Cancer Research, and Clinical Chemistry.

               *    M.D. Anderson and Ciphergen are collaborating to discover
                    and characterize markers that can predict a lung cancer
                    patient's response to platinum therapy. Only a subset of
                    lung cancer patients responds to platinum therapy, which is
                    extremely costly and has negative side-effects.

               *    Investigators at INSERM are collaborating with Ciphergen to
                    identify biomarkers derived from inflammatory cells that can
                    predict outcome in patients with colon cancer. The
                    inflammatory reaction is an important component of the host
                    response protein amplification cascade that may provide
                    targets for cancer detection, monitoring and therapeutics.

               *    Ciphergen and a separate group of investigators at INSERM
                    are collaborating to identify biomarkers that are protective
                    against hypertension, a major cause of morbidity and
                    mortality including myocardial infarction, stroke and renal
                    disease.

               *    The Institute Paoli-Calmettes and Ciphergen are working
                    together to identify proteins that can predict response to
                    anthracycline or Herceptin(R) therapy. Better prediction of
                    response would permit more tailored therapeutic decisions.



               *    Ciphergen is a participant in the ADDNET consortium in
                    Scandinavia, dedicated to discover, characterize and
                    validate urinary biomarkers for renal impairment in patients
                    with diabetes. Ciphergen technology and expertise in
                    biomarker discovery and assay are key components in this
                    effort to develop novel diagnostic tests for the early
                    detection of renal failure due to diabetes.

               *    Researchers at Stanford are collaborating with Ciphergen
                    to discover novel biomarkers that can be used to diagnose
                    peripheral artery disease, a major complication of
                    diabetes. Preliminary results were presented at the
                    Society for Vascular Medicine and Biology meeting and will
                    be presented in the Young Investigator Award competition
                    at the American College of Cardiology meeting in March
                    2005.

               *    Ciphergen and a multi-institutional roster of
                    investigators have identified a set of biomarkers that
                    appear to be changed in the early stages of Alzheimer's
                    disease. Many of these markers appear to have a
                    pathophysiological basis, suggesting that they may be
                    useful in identifying drug targets or monitoring for drug
                    efficacy. These results were presented in a plenary
                    lecture by Dr. Kaj Blennow (Gothenburg University, Sweden)
                    at the 9th International Congress for Alzheimer's disease
                    in July 2004.

               *    McGill University and Ciphergen are collaborating to
                    discover, validate and identify blood biomarkers for
                    parasitic diseases, including Chagas disease, toxoplasmosis
                    and malaria. Early detection of these diseases may reduce
                    morbidity associated with long-term infection.

     *    Patents.  We filed an additional 27 patent applications during 2004,
          the most new filings of any year in our history.  These applications
          relate to our products and technologies, and to biomarker
          discoveries.  Our patent portfolio now consists of 23 issued U.S.
          patents and 102 pending U.S. patent application families.  In
          January 2005, we were granted U.S. patent 6,844,165, directed to the
          detection of multiple diagnostic markers by SELDI-TOF-MS for the
          diagnosis of disease; this patent complements several existing
          issued U.S. patents covering biomarker proteomics.



    About Ciphergen
    Ciphergen's Biosystems Division develops, manufactures and markets a family
of ProteinChip(R) Systems and services for clinical, research and process
proteomics applications. ProteinChip Systems enable protein discovery,
validation, identification and assay development to provide researchers with
predictive, multi-marker assay capabilities and a better understanding of
biological function at the protein level. Ciphergen's Diagnostics Division is
dedicated to the discovery of protein biomarkers and panels of biomarkers and
their development into protein molecular diagnostic tests that improve patient
care; and to providing collaborative R&D services through its Biomarker
Discovery Center(R) laboratories for biomarker discovery for new diagnostic
tests as well as pharmacoproteomic services for improved drug toxicology,
efficacy and theranostic assays. Additional information about Ciphergen can be
found at www.ciphergen.com.

    Safe Harbor Statement
    Note Regarding Forward-Looking Statements: This press release contains
forward-looking statements. For purposes of the Private Securities Litigation
Reform Act of 1995 (the "Act") Ciphergen disclaims any intent or obligation to
update these forward-looking statements, and claims the protection of the Safe
Harbor for forward-looking statements contained in the Act. Examples of such
forward-looking statements include our financial outlook for 2005, including
without limitation, statements regarding expected revenue and increasing
quarterly revenue, and expected gross margin and net loss, statements regarding
new product introductions in 2005, anticipated results of prestigious
laboratories and collaborations employing our products and services,
commencement of shipping of our Deep Proteome products in 2005, the potential
for our ProteinChip technology to yield useful protein biomarkers, our ability
to develop and commercialize protein molecular diagnostics that improve patient
care, the achievement of major milestones by our Diagnostics Division and its
ability to provide services that lead to improved toxicology assays and
diagnostic assays. Actual results may differ materially from those projected in
such forward-looking statements due to various factors, including the risk that
the Company is unable to generate significant growth in unit sales while
maintaining pricing, managing our manufacturing costs and operating expenses
consistent with our plans, the risk that our ProteinChip technology is unable to
discover, validate and/or develop protein biomarkers as diagnostic or toxicology
assays, Ciphergen's ability to successfully commercialize any such tests, and
our ability to protect and promote our proprietary technologies, the risk that
we do not successfully launch our new product introductions and that such new
products do not receive market acceptance or generate revenue at a rate or in
the amounts we anticipate, and the risk that our Diagnostics Division does not
achieve commercial partnerships due to an inability to come to mutually
acceptable business terms or does not achieve clinical test launch milestones
due to a failure to validate the performance of potential clinical assays in
larger studies, an inability to translate research assays into highly
reproducible commercially acceptable assays, a failure to achieve cGMP status
and other factors. Investors should consult Ciphergen's filings with the
Securities and Exchange Commission, including its Form 10-Q dated November 9,
2004, for further information regarding these and other risks of the Company's
business.

    NOTE:  Ciphergen, ProteinChip and Biomarker Discovery Center are
registered trademarks of Ciphergen Biosystems, Inc.



                           Ciphergen Biosystems, Inc.
            Unaudited Condensed Consolidated Statements of Operations
                      (in thousands, except per share data)



                                          Three Months Ended           Twelve Months Ended
                                             December 31,                 December 31,
                                     ---------------------------   ---------------------------
                                         2003           2004           2003           2004
                                     ------------   ------------   ------------   ------------
                                                                      
Revenue                              $     11,562   $     10,098   $     43,638   $     40,181
Cost of revenue (1)                         3,916          3,867         22,594         15,075
Gross profit                                7,646          6,231         21,044         25,106

Operating expenses:
  Research and development                  5,753          3,702         23,628         19,268
  Sales and marketing                       5,882          6,318         21,335         26,376
  General and administrative                3,085          3,425         14,815         14,136
     Total operating expenses              14,720         13,445         59,778         59,780

Loss from operations                       (7,074)        (7,214)       (38,734)       (34,674)

Interest and other income
 (expense), net                              (381)          (550)          (211)        (2,145)
Loss from continuing operations
 before income taxes                       (7,455)        (7,764)       (38,945)       (36,819)

Income tax provision (benefit) for
 continuing operations                        (71)          (186)           (47)           109
Net loss from continuing
 operations                                (7,384)        (7,578)       (38,898)       (36,928)

Discontinued operations (2):
  Gain (loss) from discontinued
   operations, net of tax                     675           (638)         2,151         (1,440)
  Gain from sale of BioSepra
   business, net of tax                        --         18,527             --         18,527
Net income from discontinued
 operations                                   675         17,889          2,151         17,087

Net income (loss)                    $     (6,709)  $     10,311   $    (36,747)  $    (19,841)

Basic and diluted income (loss)
 per share information:
  Loss from continuing operations    $      (0.25)  $      (0.26)  $      (1.38)  $      (1.26)
  Income from discontinued
   operations                                0.02           0.61           0.07           0.58
    Net income (loss)                $      (0.23)  $       0.35   $      (1.31)  $      (0.68)

Shares used in computing basic and
 diluted income (loss) per share           28,918         29,419         28,154         29,244


(1)  In the fiscal year ended December 31, 2003, cost of revenue included a
     non-recurring expense of $7,257 related to our litigation settlement.
(2)  Amounts attributable to our BioSepra business, which was sold on
     November 30, 2004, have been reclassified to gain (loss) from
     discontinued operations.



                           Ciphergen Biosystems, Inc.
                 Unaudited Condensed Consolidated Balance Sheets
                                 (in thousands)

                                                      As of December 31,
                                                 ---------------------------
                                                     2003           2004
                                                 ------------   ------------
                                                   (Note 1)
ASSETS
Current assets:
  Cash and cash equivalents                      $     32,853   $     35,392
  Short term investments                               14,463          2,175
  Accounts receivable, net                             14,731         10,811
  Inventories                                           8,300          6,919
  Notes receivable from related parties                    56            126
  Prepaid expenses and other current assets             2,878          1,847
    Total current assets                               73,281         57,270

Property, plant and equipment, net                     15,891          9,315
Goodwill and other intangible assets, net               9,879          5,569
Other long term assets                                  2,759          2,223
Notes receivable from related parties                     216             --
    Total assets                                 $    102,026   $     74,377

LIABILITIES, MINORITY INTEREST AND
STOCKHOLDERS' INTEREST
Current liabilities:
  Accounts payable                               $      5,062   $      3,369
  Accrued liabilities                                   9,495          7,675
  Current portion of deferred revenue                   5,768          5,441
  Current portion of capital lease obligations            324             16
  Current portion of long term debt                       662            925
    Total current liabilities                          21,311         17,426

Deferred revenue, net of current portion                  594            767
Capital lease obligations, net of
 current portion                                        2,274             28
Long term debt, net of current portion                  1,090            377
Convertible senior notes, net of discount              27,515         28,051
Other long term liabilities                             1,185          1,013
    Total liabilities                                  53,969         47,662

Minority interest                                         165             --

Stockholders' equity:
  Common stock                                             29             29
  Additional paid in capital                          186,043        187,133
  Notes receivable from stockholders                   (1,093)          (349)
  Deferred stock-based compensation                      (725)            --
  Accumulated other comprehensive income                4,158            263
  Accumulated deficit                                (140,520)      (160,361)
    Total stockholders' equity                         47,892         26,715
    Total liabilities, minority interest and
     stockholders' equity                        $    102,026   $     74,377

(1)  The condensed consolidated balance sheet at December 31, 2003 has been
     derived from the audited consolidated financial statements at that
     date included in the Company's Form 10-K for the fiscal year ended
     December 31, 2003.

SOURCE  Ciphergen Biosystems, Inc.
    -0-                             02/17/2005
    /CONTACT:  Sue Carruthers, Investor Relations of Ciphergen Biosystems,
Inc., +1-510-505 2297/
    /Web site:  http://www.ciphergen.com /