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  5. 427 F.2d 797 (1970)
 

APPLICATION OF PRENGLE

Patent Appeal No. 8305.

427 F.2d 797 (1970)

Application of Robert Smith PRENGLE and Frederick Robert Winter.

United States Court of Customs and Patent Appeals.

June 18, 1970.

Attorney(s) appearing for the Case

Claude L. Beaudoin, attorney of record, for appellants. James T. Corle, Arlington, Va., of counsel.

Joseph Schimmel, Washington, D. C., for the Commissioner of Patents. J. Nakamura, Washington, D. C., of counsel.

Before WORLEY, Chief Judge, and RICH, ALMOND, BALDWIN, and LANE, Judges.

WORLEY, Chief Judge.

The issue here is whether the Board of Appeals committed reversible error in sustaining the examiner's rejection of claims 3 and 51 as obvious under 35 U.S. C. § 103 in view of certain prior art.

The invention relates to a method of heat-treating biaxially-oriented polyethylene terephthalate or polyvinyl chloride films to render them dimensionally stable and resistant...

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