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NATTA v. ZLETZ

No. 16997.

405 F.2d 99 (1968)

Giulio NATTA, Piero Pino and Georgio Mazzanti, ex rel. Interference 89,634, Appellants, v. Alex ZLETZ and Standard Oil Company of Indiana, Appellees.

United States Court of Appeals Seventh Circuit.

December 19, 1968.

Attorney(s) appearing for the Case

Kenneth J. Burns, Jr., Raymond, Mayer, Jenner & Block, Chicago, Ill., Edward S. Irons, Mary Helen Sears, Irons, Birch, Swindler & McKie, Washington, D. C., for appellants.

William R. Jentes, Fred H. Bartlit, Jr., Elsie C. Spears, Kirkland, Ellis, Hodson, Chaffetz & Masters, Chicago, Ill., for appellees; Arthur G. Gilkes, Ralph C. Medhurst, Chicago, Ill., John Kelton, Watson, Leavenworth, Kelton & Taggart, New York City, of counsel.

Before CASTLE, Chief Judge, KNOCH, Senior Circuit Judge, and CUMMINGS, Circuit Judge.

CUMMINGS, Circuit Judge.

In September 1958, the United States Patent Office instituted Interference No. 89,634 to determine which of four applicants for a patent first invented a plastic product known as solid polypropylene. Defendants Zletz and his assignee, Standard Oil Company of Indiana ("Standard"), and other junior parties to the Interference introduced evidence before the Board of Patent Interferences in an attempt to advance their invention dates prior to...

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