McDERMOTT, Circuit Judge.
Appellant here, plaintiff below, is the owner of United States Patent 1,877,504, issued September 13, 1932, upon application filed June 30, 1932. The object of the invention is to increase the recovery of oil from wells in a limestone formation, and is attained by injecting an inhibited hydrochloric acid (HC1) into the formation, which eats away the retaining rock structure and frees the oil. The genius of the invention is in the use of a...
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