du Pont de Nemours and Co. Patent: US1987685 , 1929 ; Full Text Show Details Manulkin Zhurnal Obshchei Khimii, 1946 , vol. 16, p. 237,240,241 Chem.Abstr., 1947 , p. 90 Full Text Show Details Ainley; Elson; Sexton Journal of the Chemical Society, 1946 , p. 776 Full Text Show Details du Pont de Nemours and Co. Patent: DE565609 , 1929 ; Fortschr. Teerfarbenfabr. Verw. Industriezweige, vol. 19, p. 3355 Full Text Show Details du Pont de Nemours and Co. Patent: US1993777 , 1932 ; Full Text Show Details du Pont de Nemours and Co. Patent: US1993776 , 1932 ;