321. ------. [CARPENTER, G. B.] (E. I. du Pont de Nemours & Co.). Alphatic Carboxylic Acids. United States Patent 1,924,768. Aug. 29, 1933: appl. filed Aug. 24, 1931. Serial No. 559,125; 7 claims (Cl. 260-116). Chem. Abs., vol. 27, 1933. p. 5340.

Patent Abstracts

321. ------. [CARPENTER, G. B.] (E. I. du Pont de Nemours & Co.). Alphatic Carboxylic Acids. United States Patent 1,924,768. Aug. 29, 1933: appl. filed Aug. 24, 1931. Serial No. 559,125; 7 claims (Cl. 260-116). Chem. Abs., vol. 27, 1933. p. 5340.

This patent is similar to United States Patent 1,924,767 (abs. 320) but uses a catalyst containing at least 2 chemically combined elements the oxides of which are acidic, such as a phosphotungstic acid.