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United States Patent

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United States Patent 2,061,470
Issue Date: November 17, 1936

Current U.S. Class: 518/713 ; 502/241; 502/304
Current International Class: B01J 23/76 (20060101); B01J 23/84 (20060101); C07C 29/00 (20060101); C07C 29/154 (20060101)


For U.S. patent law, rules, and procedures see MPEP.

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