In Re Larkin

O’CONNELL, Judge.

The record discloses that this appeal was taken from the decision of the Board of Appeals of the United States Patent Office affirming that of the examiner rejecting claims 1-9, 12-20, and 24, 26 and 27 of appellant’s application for a patent on alleged new and useful improvements in a heat exchanger, together with the machine for and the method of making the heat exchanger, which is used, by way of example, for refrigeration apparatus.

Claims 1, 20, and 24 are illustrative. They read as follows:

“L A heat exchanger having a surface and a conduit on said surface, said conduit…