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United States Patent 3,756,942
Issue Date: September 4, 1973

Current U.S. Class: 208/137 ; 208/138; 208/139; 208/141; 585/407; 585/430; 585/431
Current International Class: C10G 35/00 (20060101); C10G 35/095 (20060101); B01J 29/40 (20060101); B01J 29/00 (20060101); B01J 29/44 (20060101)


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

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