Application of Francis N. Apel, Louis B. Conte and Howard L. Bender

SMITH, Judge.

The issue here, as in companion appeal PA 7244, 342 F.2d 455, arises under 35 U.S.C. § 103 and requires us to determine whether the differences between appellants’ invention and the prior art are such that the subject matter as a whole would have been obvious at the time the invention was madé tó a person having ordinary skill in this art.

The process disclosed in appellants’ application 1 and claimed in appealed claims 1 through 6 reacts phenols and aldehydes to produce alkylidene bisphenols, the reaction being catalyzed by a cation exchanging resin. The cation exchanging resin…