Soc.Usines Chim.Rhone-Poulenc Patent: DE527874 , 1929 ; Full Text Show Details Soc.Usines Chim.Rhone-Poulenc Patent: DE531336 , 1929 ; Fortschr. Teerfarbenfabr. Verw. Industriezweige, vol. 18, p. 142,798