ZENITH LABORATORIES v. BRISTOL-MYERS SQUIBB

No. 92-1527.

19 F.3d 1418 (1994)

ZENITH LABORATORIES, INC., Plaintiff-Appellant, v. BRISTOL-MYERS SQUIBB COMPANY, Defendant-Appellee.

United States Court of Appeals, Federal Circuit.

Rehearing Denied; Suggestion for Rehearing Declined May 27, 1994.


Attorney(s) appearing for the Case

Stephen N. Shulman, Cadwalader, Wickersham & Taft, Washington, DC, argued for plaintiff-appellant. With him on the brief was Mark C. Ellenberg. Also on the brief were William L. Mentlik and Arnold H. Krumholz, Lerner, David, Littenberg, Krumholz & Mentlik, Westfield, NJ.

S. Leslie Misrock, Pennie & Edmonds, New York City, argued for defendant-appellee. Of counsel were Brian D. Coggio, Jennifer Gordon and Kent H. Cheng, Pennie & Edmonds, New York City. Also on the brief was Frederick B. Lacey, LeBoeuf, Lamb, Leiby & MacRae, Newark, NJ.

Before PLAGER, CLEVENGER, and SCHALL, Circuit Judges.


Rehearing Denied; Suggestion for Rehearing In Banc Declined May 27, 1994.

PLAGER, Circuit Judge.

The question in this declaratory judgment action is whether a drug compound, which in its manufactured state does not infringe the patent in suit, becomes infringing as a result of transitory chemical changes that occur in vivo, that is, as a result of ingestion by the patient. There are fact issues—what changes actually occur when the drug is ingested...

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