In re Mason

BLAND, Associate Judge.

After allowing certain claims in appellants’ application for a patent relating to fluid transmission, the Primary Examiner of the United States Patent Office refused to allow claims 1 to' 4, inclusive, and 7 to 12, inclusive, of which claims 1 and 11 are illustrative and read:

“1. In a water supply system comprising a main conduit and a pump for maintaining a water pressure, means for suppressing pulsations of the water pressure due to the pump comprising a side branch from said conduit adapted to retain a volume of entrapped air when the main conduit is filled with…