GRAHAM, Presiding Judge.
On April 21, 1931, the appellant filed an application in the United States Patent Office for a patent on certain alleged "new and useful improvements in process for the production of volatilisable products from coal or coal and oil and for the production of gas by heat treatment of carbonaceous material." The Primary Examiner finally rejected claims 22 to 25, inclusive, all the claims in the application. These were rejected on the following...
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