In re Crawford

This is an appeal from the decision of the Board of Appeals of the United States Patent Office sustaining the primary examiner’s rejection, of claims 24,25, 27 and 28 of appellant’s application No. 388,175 for a patent on an earth boring method and apparatus. Claims 30, 31, 39 and 40 were originally included in the appeal, but the appeal as to those claims has been withdrawn. Fifteen claims of the application have been allowed.

Claims 24 and 27 which are representative of the appealed claims are as follows:

24. An explosive perforating unit, comprising, a hollow casing composed of imperforate…