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United States Patent

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United States Patent 3,554,921
Issue Date: January 12, 1971

Current U.S. Class: 423/306 ; 426/582; 426/654; 516/905
Current International Class: A23C 19/00 (20060101); A23C 19/082 (20060101); C01B 25/00 (20060101); C01B 25/45 (20060101)


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

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