Arthur William Anderson and William Lawrence Truett v. Gustav Pieper, Hans Rickert and Eberhard Stein

LANE, Judge.

This appeal is from the decision of the Board of Patent Interferences awarding priority to appellees (hereafter Pieper) on the following count:

1. A process for the production of a solid polyethylene which comprises (1) reducing titanium tetrachloride with aluminum and (2) contacting ethylene with a catalyst consisting of the product of step (1).

Appellants (hereafter Anderson) were in a position junior to Pieper, Anderson’s application serial No. 584,887, filed May 15, 1956, being entitled to the benefit of earlier applications serial Nos. 450,243 and 450,244, both filed August 16,…