Application of John Ferguson Harris, Jr., and Donald Irwin McCane

ALMOND, Judge.

This appeal is from the decision of the Board of Appeals which affirmed the rejection by the examiner of claims 2, 4, 7 and 8 of appellants’ patent application. 1 Claims 3, 5 and 6, the only other claims remaining in the application, were allowed by the examiner.

The invention to which the rejected claims are drawn relates to' a homopolymer of an alkyl perfluorovinyl ether, which was “developed in the search for plastics which combine the outstanding physical properties of polytetra fluoroethylene with high enough melt flow to allow their fabrication by melt extrusion or…