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Return to Abstracts of Patents Return to Abstracts of Patents 250-499 Patent Abstracts470. DELCO-LIGHT CO. [Methyl Ether.] French Patent 641,580, Sept. 27, 1927. Chem. Abs., vol. 23, 1929, p. 1142. See British Patent 278,353 (abs. 183). See abs. 183. |