<Page>
Exhibit 3.73
CERTIFICATE OF INCORPORATION
OF
STEELTON, INC.
*****
FIRST. The name of the corporation is
STEELTON, INC.
SECOND. The address of its registered office In the State of
Delaware is No. 100 West Tenth Street, in the City of Wilmington, County of New
Castle. The name of its registered agent at such address is The Corporation
Trust Company.
THIRD. The nature of the business or purposes to be conducted or
promoted is:
To buy, acquire, lease and otherwise deal in, lands and interests in
lands; to construct, erect, hold, improve, develop, maintain, operate, let,
lease, mortgage, sell, and dispose of property of all kinds; to equip, furnish,
and operate, apartment houses, hotels, motels, restaurants, office buildings,
shopping centers, warehouses, buildings, and structures of all kinds.
To engage in any lawful act or activity for which corporations may be
organized under the General Corporation Law of Delaware.
To acquire, and pay for in cash, stock or bonds of this corporation or
otherwise, the good will, rights, assets and property, and to undertake or
assume the whole or any part of the obligations or liabilities of any person,
firm, association or corporation.
<Page>
To acquire, hold, use, sell, assign, lease, grant licenses in respect of,
mortgage or otherwise dispose of letters patent of the United States or any
foreign country, patent rights, licenses and privileges, inventions,
improvements and processes, copyrights, trade-marks and trade names, relating to
or useful in connection with any business of this corporation.
To acquire by purchase, subscription or othherwise, and to receive, hold,
own, guarantee, sell, assign, exchange, transfer, mortgage, pledge or otherwise
dispose of or deal in and with any of the shares of the capital stock, or any
voting trust certificates in respect of the shares of capital stock, scrip,
warrants, rights, bonds, debentures, notes, trust receipts, and other
securities, obligations, choses in action and evidences of indebtedness or
interest issued or created by any corporations, joint stock companies,
syndicates, associations, firms, trusts or persons, public or private, or by the
government of the United States of America, or by any foreign government, or by
any state, territory, province, municipality or other political subdivision or
by any governmental agency, and as owner thereof to possess and exercise all the
rights, powers and privileges of ownership, including the right to execute
consents and vote thereon, and to do any and all acts and things necessary or
advisable for the preservation, protection, improvement and enhancement in-value
thereof.
To borrow or raise moneys for any of the purposes of the corporation and,
from time to time without limit as to amount, to draw, make, accept, endorse,
execute and issue promisory notes, drafts, bills of exchange, warrants, bonds,
debentures and other negotiable or non-negotiable instruments and evidences of
indebtedness, and to secure the payment of any thereof and of the interest
thereon by mortgage upon or pledge,
2
<Page>
conveyance or assignment in trust of the whole or any part of the property of
the corporation, whether at the time owned or thereafter acquired, and to sell,
pledge or otherwise dispose of such bonds or other obligations of the
corporation for its corporate purposes.
To purchase, receive, take by grant, gift, devise, bequest or otherwise,
lease, or otherwise acquire, own, hold, improve, employ, use and otherwise deal
in and with real or personal property, or any interest therein, wherever
situated, and to sell, convey, lease, exchange, transfer or otherwise dispose
of, or mortgage or pledge, all or any of the corporation's property and assets,
or any interest therein, wherever situated.
In general, to possess and exercise all the powers and privileges granted
by the General Corporation Law of Delaware or by any other law of Delaware or by
this certificate of incorporation together with any powers incidental thereto,
so far as such powers and privileges are necessary or convenient to the conduct,
promotion or attainment of the business or purposes of the corporation.
The business and purposes specified in the foregoing clauses shall,
except where otherwise expressed, be in nowise limited or restricted by
reference to, or inference from, the terms of any other clause in this
certificate of incorporation, but the business and purposes specified in each or
the foregoing clauses of this article shall be regarded as independent business
and purposes.
FOURTH. The total number of shares of stock which the corporation
shall have authority to issue is one thousand (1,000) shares of stock, all of
which shares shall be without par value.
FIFTH. The name and mailing address of each incorporator is as
follows:
3
<Page>
NAME MAILING ADDRESS
---- ---------------
B. J. Consono 100 West Tenth Street
Wilmington, Delaware
F. J. Obara, Jr. 100 West Tenth Street
Wilmington, Delaware
A. D. Grier 100 West Tenth Street
Wilmington, Delaware
SIXTH. The corporation is to have perpetual existence.
SEVENTH. In furtherance and not in limitation of the powers
conferred by statute, the board of directors is expressly authorized:
To make, alter or repeal the by-laws of the corporation.
To authorize and cause to be executed mortgages and liens upon the real
and personal property of the corporation.
To set apart out of any of the funds of the corporation available for
dividends a reserve or reserves for any proper purpose and to abolish any such
reserve in the manner in which it was created.
By a majority of the whole board, to designate one or more committees,
each committee to consist of two or more of the directors of the corporation.
The board may designate one or more directors as alternate members of any
committee, who may replace any absent or disqualified member at any meeting of
the committee. Any such committee, to the extent provided in the resolution or
in the by-laws of the corporation, shall have and may exercise the powers of the
board of directors in the management of the business and affairs of the
corporation, and may authorize the seal of the corporation to be affixed to all
papers which may require it; provided, however, the by-laws may provide that in
the absence or disqualification of any member of such committee or committees,
the member or members thereof present at any meeting and not disqualified
4
<Page>
from voting, whether or not he or they constitute a quorum, may unanimously
appoint another member of the board of directors to act at the meeting in the
place of any such absent or disqualified member.
When and as authorized by the affirmative vote of the holders of a
majority of the stock issued and outstanding having voting power given at a
stockholders' meeting duly called upon such notice as is required by statute, or
when authorized by the written consent of the holders of a majority of the
voting stock issued and outstanding, to sell, lease or exchange all or
substantially all of the property and assets of the corporation, including its
good will and its corporate franchises, upon such terms and conditions and for
such consideration, which may consist in whole or in part of money or property
including shares of stock in, and/or other securities of, any other corporation
or corporations, as its board of directors shall deem expedient and for the best
interests of the corporation.
EIGHT. Whenever a compromise or arrangement is proposed between
this corporation and its creditors or any class of them and/or between this
corporation and its stockholders or any class of them, any court of equitable
jurisdiction within the State of Delaware may, on the application in a summary
way of this corporation on of any creditor or stockholder thereof, or on the
application of any receiver or receivers appointed for this corporation under
the provisions of section 291 of Title 8 of the Delaware Code or on the
application of trustees in dissolution or of any receiver or receivers appointed
or this corporation under the provisions of section 279 of Title 8 of the
Delaware Code order a meeting of the creditors or class of creditors, and/or of
the stockholders or class of stockholders of this corporation, as the case may
be, to be
5
<Page>
summoned in such manner as the said court directs. If a majority in number
representing three-fourths in value of the creditors or class of creditors,
and/or of the stockholders or class of stockholders of this corporation, as the
case may be, agree to any compromise or arrangement and to any reorganization of
this corporation as consequence of such compromise or arrangement, the said
compromise or arrangement and the said reorganization shall, if sanctioned by
the court to which the said application has been made, be binding on all the
creditors or class of creditors, and/or on all the stockholders or class of
stockholders, of this corporation, as the case may be, and also on this
corporation.
NINTH. Meetings of stockholders may be held within or without the
State of Delaware, as the by-laws may provide. The books of the corporation may
be kept (subject to any provision contained in the statutes) outside the State
of Delaware at such place or places as may be designated from time to time by
the board of directors or in the by-laws of the corporation. Elections of
directors need not be by written ballot unless the by-laws of the corporation
shall so provide.
TENTH. The corporation raserves the right to amend, alter, change
or repeal any provision contained in this certificate of incorporation, in the
manner now or hereafter prescribed by statute, and all rights conferred upon
stockholders herein are granted subject to this reservation.
6
<Page>
WE, THE UNDERSIGNED, being each of the incorporators hereinbfore named for the
purpose of forming a corporation pursuant to the General Corporation Law of the
State of Delaware, do make this certificate, hereby declaring and certifying
that this is our act and deed and the facts herein stated are true, and
accordingly have hereunto set our hands this 5th day of February, 1968.
/s/ B. J. Consono
-------------------------
B. J. Consono
/s/ F. J. Obara, Jr.
-------------------------
F. J. Obara, Jr.
/s/ A. d. Grier
-------------------------
A. D. Grier
STATE OF DELAWARE )
) ss:
COUNTY OF NEW CASTLE )
BE IT REMEMBERED that on this 5th day of February, 1968, personally came
before me, a Notary Public for the State of Delaware, B.J. Consono, F. J. Obara,
Jr. and A.D. Grier, all of the parties to the foregoing certificate of
incorporation, known to me personally to be such, and severally acknowledged the
said certificate to be the act and deed of the signers respectively and that the
facts stated therein are true.
GIVEN under my hand and seal of office the day and year aforesaid.
/s/ A. Dana Atwell
-------------------------------
Notary Public
[SEAL]
7
<Page>
CERTIFICATE OF CHANGE OF LOCATION OF REGISTERED OFFICE
AND OF REGISTERED AGENT
It is hereby certified that:
1. The name of the corporation (hereinafter called the "corporation")
is STEELTON, INC.
2. The registered office of the corporation within the State of
Delaware is hereby changed to 229 South State Street, City of Dover 19901,
County of Kent.
3. The registered agent of the corporation within the State of
Delaware is hereby changed to The Prentice-Hall Corporation System, Inc., the
business office of which is identical with the registered office of the
corporation as hereby changed.
4. The corporation has authorized the changes hereinbefore set forth
by resolution of its Board of Directors.
Signed on February 18, 1977.
/s/ William H. Klein
--------------------------------
William H. Klein, Vice President
Attest:
/s/ Howard Shapiro
- -------------------------------
Howard Shapiro, Asst. Secretary
8
<Page>
CERTIFICATE OF CHANGE OF REGISTERED OFFICE
AND OF REGISTERED AGENT
Steelton, Inc. a corporation organized and existing under the General
Corporation Law of the State of Delaware, DOES HEREBY CERTIFY THAT:
The present registered agent of the corporation is The Prentice-Hall
Corporation Systems, Inc., 32 Loockerman Sq., Suite L-100, Dover, DE 19901 and
the present [?registered office of?] the corporation is in the county of Kent.
The Board of Directors of Steelton, Inc. adopted the following resolution
on the ___ day of May, 1994.
Resolved, that the registered office of Steelton, Inc. in the state of
Delaware be and hereby is changed to Corporation Trust Center, 1209 Orange
Street, in the City of Wilmington, County of New Castle, and the authorization
of tire present register agent of this company be and the same is hereby
withdrawn, and THE CORPORATION TRUST COMPANY, be and is hereby constituted and
appointed the registered agent of this corporation at the address of its
registered office.
IN WITNESS WHEREOF, Steelton, Inc. has caused this statement to be signed
by Howard Shapiro, its Vice President, and attested by Irma Villarreal, his
Secretary this 20th day of May, 1994.
By: /s/ Howard Shapiro
---------------------------------
Howard Shapiro,Vice President
ATTEST:
By: /s/ Irma Villarreal
-------------------------------
Irma Villarreal, Secretary
9