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Return to Abstracts of Patents Return to Abstracts of Patents 500-749 Patent Abstracts544. ------. [DREYFUS, H.] [Methanol Synthesis.] French Patent 345,649, no date. Schmidt, J., Das Kohenoxyd, Akad. Verlagsgesell., Leipzig, 1950, p. 205. Catalysts are oxides that were precipitated electrolytically as hydroxides. |