366. ------. [CHEMISCHES WERK SCHOLLENE G. M. B. H.] [Refined Cumarone Resins.] German Patent Appl. C 57,593, no date (Cl. IV c-22 h). Auszüge deut. Patent-Anmeldungen. Vol. 6, p. 654.

Patent Abstracts

366. ------. [CHEMISCHES WERK SCHOLLENE G. M. B. H.] [Refined Cumarone Resins.] German Patent Appl. C 57,593, no date (Cl. IV c-22 h). Auszüge deut. Patent-Anmeldungen. Vol. 6, p. 654.

Selective processing of cumarone resins by dissolving 2 parts of cumarone resin in 1 part benzol and the precipitating the dark constituents by means of Fischer-Tropsch benzine.