In re Davis

This is an appeal from a decision of the Board of Appeals of the United States Patent Office affirming a decision of the Primary Examiner rejecting claim 3 of appellants’ application for a patent upon the ground that it is drawn to subject matter not divisible from that claimed in appellants’ patent No. 2,087,682, issued July *72420, 1937. Appellants’ instant application was filed on May 26, 1936.

Claim 3 reads as follows:

3. The method of making a pour test depressor which will he effective in heavy oils, which method comprises heating a mixture of a chlorinated wax with naphthalene to reaction…