In re Dalzell

Appellants appeal from a decision of the Board of Appeals of the United States Patent Office affirming that of the Primary Examiner in finally rejecting claims 1 to 10 inclusive, 12 to 20 inclusive, 22, 27, 31 and 53 of their application for a patent on improvements in a “Heat Exchange Device.” Claim 11 was allowed by the examiner and claims 23, 29 and 30 were allowed by the board reversing the decision of the examiner with respect thereto. The rejections were based on lack of invention over the cited prior art. Certain claims were also rejected as aggregative.

The invention relates to a…