Filed by Epitope, Inc. pursuant to Rule 425 under the Securities Act of 1933, as amended Subject Company: STC Technologies, Inc. Commission File No. 132-01850 On May 6, 2000, Epitope, Inc., an Oregon corporation, STC Technologies, Inc., a Delaware corporation, and Epitope Merger Sub, Inc., a Delaware corporation, executed a definitive Agreement and Plan of Merger. The following are slides related to the above noted transaction to be presented to analysts on May 11, 2000. RISKS AND MORE INFORMATION Forward-Looking Statements -------------------------- o Statements about future events or performance are "forward-looking statements" o Actual results may differ significantly, depending on: - Whether the companies realize benefits expected from the merger - Whether the merger is approved by shareholders - Whether the merger results in unexpected liabilities - The "Risk Factors" described in Epitope's 1999 10-K o Forward-looking statements are much less reliable than historical information Merger Information ------------------ o Detailed information will appear in: - A Registration Statement to be filed with the SEC - A Proxy Statement/Prospectus to be mailed to shareholders o INVESTORS ARE URGED TO READ THESE DOCUMENTS BECAUSE THEY CONTAIN IMPORTANT INFORMATION o Both will be available free at the SEC's web site (www.sec.gov) or from Epitope o Epitope personnel may solicit proxies in favor of the merger o Their interests in the merger will be described in the Proxy Statement/Prospectus [Logo] Epitope, Inc. to be renamed OraSure Technologies, Inc. Deutsche Banc Alex.Brown 2000 HEALTH CARE CONFERENCE May 11, 2000 Epitope and STC Technologies to Merge $200 MILLION ALL-STOCK DEAL CREATES ORAL FLUID AND POINT-OF-CARE MEDICAL DIAGNOSTICS LEADER [EPITOPE LOGO] + [STC TECHNOLOGIES, INC. LOGO] = diagnostic solutions for the new millennium [ORASURE TECHNOLOGIES, INC. LOGO] diagnostic solutions for the new millennium [LOGO] OraSure Technologies -------------------- THE WORLD'S PREMIER ORAL FLUID DIAGNOSTICS COMPANY o Merging the top two oral fluid companies hits our mission dead-center o Epitope - OraSure Infectious disease OraQuick o STC - Top oral fluid assay company Drugs of Abuse, UPT technology Cotinine ORAL FLUID IS THE FUTURE OF DIAGNOSTICS o Non-invasive - testing without needles o Collection anytime, anywhere o Broad variety of analytes available for development (e.g., cancer markers, diabetic markers, genetic tests) o Point-of-care ready - lab accuracy with point-of-care convenience o Cost efficient - eliminates collection cost ($7-15) - -------------------------------------------------------------------------------- WE ARE POSITIONED TO CHANGE THE CURRENT SELECTION AND TESTING PARADIGMS. - -------------------------------------------------------------------------------- WE WILL IMPROVE MILLIONS OF LIVES. ---------------------------------- POINT OF CARE TESTING IS INEVITABLE o Immediate results means quicker treatment o New technology allowing accuracy comparable with labs at lower costs o Just as personal computers distributed computing power to desktop, new technologies are bringing testing to the clinic/hospital tabletop - -------------------------------------------------------------------------------- WE WILL REDEFINE RAPID POINT-OF-CARE TESTING TO AND BRING IT TO ORAL FLUIDS - -------------------------------------------------------------------------------- TECHNOLOGY PLATFORMS o OraQuick(TM) - Oral fluid rapid-test device - Visually read - HIV product launched in July 2000 at International Aids Conference in Durban, South Africa - Entering trials for US approval, target PMA submission by Q1 2001 o OraSure(TM) - Oral fluid collection and preservation device for laboratory based testing - Only oral fluid device approved for HIV, drugs of abuse - Major markets - public health and insurance testing - Significant product line expansion possibilities with UPT-hepatitis, syphilis, diabetic markets, cancer markers TECHNOLOGY PLATFORMS o UPlink(TM) - Point-of-care rapid-test instrument based on UPT (up-converting phosphor technology) - Multiple specimen types, multiplex capability - More sensitive than competing POC instruments - First product, for drugs of abuse testing, will be submitted to FDA for approval in Q1 2001 - Particularly well suited to oral fluid, where extra sensitivity is critical o UPT(TM) - Premiere label technology - zero background noise, "pin-drop clarity" - Broad market applications - Multiple specimen types - Multiple tests on one sample simultaneously (multiplexed) OraQuick(R) HIV-1/2 [Photo of OraQuick(R) Device] o Perfect for public health outreach testing and third world o Benefit of immediate feedback and counseling o Extremely cost efficient o Early clinical results indicate laboratory- level accuracy o Ready-made $100 million international rapid-test market being served strictly with whole blood tests Epitope and STC have highly complimentary product lines and customer lists in lab-based oral fluid testing Collection Assay Device HIV Confirm only Cocaine EPTO STC Lab- based Nicotine EPTO STC oral NIDA-5 EPTO STC fluid testing Syphilis EPTO Hepatitis EPTO By coordinating and collaborating, STC/Epitope can: o Expand the testing menu o Capture both collection device and assay revenues on new tests o Grow oral fluid testing's share of key markets: - PUBLIC HEALTH - DRUGS OF ABUSE - INSURANCE The more tests available, the more attractive oral fluid gets - ------------------------------------------------------------- Who is STC? STC is a privately held company that develops, manufactures, and markets proprietary in vitro diagnostic products and medical devices for us in clinical labs, physicians' offices, and workplace testing. Since its founding in 1987, STC has twice been named to Inc. magazine's list of the 500 Fastest-Growing Private Companies in America. STC Business Highlights - - 31% compounded revenue growth - 10 years - - Diverse product mix of in vitro diagnostic products and medical devices - - Long-term business partnerships - - Revenue and cash flow annuities - - Niche market leadership - - Sales and distribution networks - - Great gross margins - - Low cost producer/GMP facility - - Strong research capabilities - - Strong product commercialization track record - - Regulatory expertise, especially oral fluids - - Strong balance sheet. CURRENT BUSINESS PRODUCTS Insurance Risk Assessment Drugs of Abuse Testing [photo of testing reagents] [photo of testing reagents] On-Site Alcohol Testing Physicians' Offices Portable Cryosurgical System [photo of testing device] [photo of physician using system with patient] MARKET LEADERSHIP Oral Fluid Testing - - Sold 3 million tests in 1999 for detecting nicotine and cocaine for insurance risk assessment - - Sold 400,000 Q.E.D.(R) Saliva Alcohol Tests in 1999 - - First and only company with FDA clearance to sell lab-based microplate test kits for drugs of abuse (DOA) testing from an oral fluid sample - - STC working with regulators to draft oral fluid drug testing standards for the workplace - - Committed to leading the emerging oral fluid drug testing market, both for lab-based and on-site testing solutions. [Intercept logo] Intercept(TM) The Oral Fluid Drug Test [photo of Intercept(TM) devices] INTERCEPT(TM) DOA Testing - - Compete in $300 million drug testing market - - Compete in $800 million specimen collection market - - Secured exclusive distribution rights for Epitope's proprietary oral fluid collection device for DOA testing - - Signed up LabOne as exclusive distributor for sales to workplace testing market - - Signed up LabOne as turn-key laboratory testing service for Intercept(TM) - - Launched introductory marketing programs and 4intercept.com web site in February 2000 UP-CONVERTING PHOSPHOR TECHNOLOGY STC is developing a proprietary platform label detection technology called UPT(TM) (Up-Converting Phosphor Technology). UPT(TM) Combines Biological and Video Display Technologies [photo of television screen] + [graphic of biotechnology symbol] o Particles from o Biotechnology a TV screen [graphic of biotechnology symbol with biological sample] o UPT(TM) Bio-Particles WHAT IS UP-CONVERSION? [graphic of high and low energy, Ultraviolet/Visible/Infrared Wavelength UPT(TM) converts lower to higher energy with up and down arrows] KEY UPT(TM) FEATURES [graphic of UPT(TM) Visible and Infrared] - Multiple colors (multiplexed testing) - No background - High sensitivity (10-18M) - Permanent record (no fading) - Supports miniaturization - Interference free - Suitable for any testing matrix BROAD MARKET APPLICATIONS [circular graphic of UPT(TM) applications for: High Throughput Drug Screening In Vitro Diagnostics Chemical & Biological Warfare Food & Environmental Testing Veterinary Testing Surgical Imaging Genomics & Pharmacogenomic Applications Image Analysis/Miniaturized Platforms] Deal Terms A Merger of Equals - -------------------------------------------------------------------------------- o Consideration: 20.0 million Epitope shares (versus 20.5 million current Epitope shares including all options and warrants) o Structure: stock-for-stock merger o Accounting Treatment: pooling of interest o Tax Treatment: tax free merger under section 368 of IRS code o Collars: asymmetrical based on Epitope's 20 day average share price o Closing Conditions: shareholder approval, no material adverse change Summary of Collar [graphic of STC implied equity purchase price (vertical axis ranging from 125 to 300) and Edward 20 day average stock price (horizontal axis ranging from 6.00 to 15.00] Range of Stock Prices Purchase Price/Shares - --------------------- --------------------- $6.00-8.00 Fixed Shares (25 million) 8.00-10.00 $200 million fixed purchase price 10.00-13.00 Fixed shares (20 million) 13.00+ $260 million fixed purchase price 12 Months ended 3/31/00 Epitope STC Combined ---------------------------------- REVENUES 11.5 14.7 26.2 GROSS MARGIN 6.9 10.1 17.0 60% 69% 65% SGA 7.8 5.6 13.4 OPERATING INC (PRE R&D) (0.9) 4.5 3.6 RESEARCH & DEV 2.5 5.1 7.6 OPERATING INC. (3.4) (0.6) (4.0) ASSETS 17.1 19.2 36.3 CASH 11.4 8.6 20.0 LTD 0.0 (6.6) (6.6) Cost Synergies o $2 million o Corporate overhead savings o Operational synergies - BRING ORASURE MANUFACTURING IN-HOUSE - COMBINED LATERAL-FLOW MANUFACTURING SKILL AND SHARED EQUIPMENT WILL BE LEVERAGED INTO LOW-COST, HIGH-VOLUME MANUFACTURING FOR ORAQUICK AND UPT - MERGER IS ACCRETIVE TO EPITOPE EPS WITH SYNERGIES AT $500,000 OR ABOVE New Product Pipeline for Years to Come Near Term - --------- o OraQuick HIV international launch 7/00, domestic launch 2002 o UPlink point-of-care drug testing system launch, Q2 2001 Long Term - --------- o Full product line of infectious disease OraQuick tests (e.g., Hep C, Hep B, etc.) o Full range of oral fluid tests on UPlink platform for physician office, hospitals, nursing homes, home health Post-Deal Strategic Priorities o Launch OraQuick HIV in international markets by the end of the summer o Submit OraQuick HIV for FDA approval by 1/01 o Submit UPlink drugs of abuse product for FDA approval by 12/31/00 o Grow base product lines by 20% or more o Achieve $2 million in cost synergies o Explore joint development agreements in other markets with UPT technology o Expand OraQuick and OraSure product lines to include other analytes - HEPATITIS, H. PYLORI, SYPHILIS, OTHER INFECTIOUS DISEASES - DIABETIC AND CARDIAC MARKERS