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Return to Abstracts of Patents Return to Abstracts of Patents 750-999 Patent Abstracts958. ------. [HEINEMANN, A.] Formaldehyde From Carbon Dioxide and Hydrogen. United States Patent 1,460,244, June 26, 1923: appl. filed June 12, 1922, Serial No. 567,809. Chem. Abs., vol. 17, 1923, p. 2886. See British Patent 179,951 (abs. 956). |