In re Hack

This is an appeal from the decision of the Board of Appeals of the United States Patent Office affirming the final rejection of claims 3 and 5 of patent application 208,449, filed January 29, 1951, for a brazing alloy.

The rejected claims, the only ones remaining in the case, read as follows:

*9553. A brazing alloy composed entirely of approximately 35% by weight of gold, approximately 62% by weight of copper, and approximately 3% by weight of nickel.

5. A brazing alloy for use under conditions of elevated temperatures and high vacuum which is characterized by low surface tension characteristics, low…