Kreidel v. Parker

This is an interference proceeding wherein the Board of Appeals of the United States Patent Office reversed a decision of the Examiner of Interferences which awarded priority of invention of the subject matter of the interference to appellant.

The interference arises between an application for patent filed by appellant on October 25, 1933, and an application filed by appellee on November 6, 1934. Appellant is therefore the senior party, and the burden was upon appellee to establish priority of invention by a pi'eponderance of evidence.

The issue embraces one count, which reads as follows:

A tube…