Verfahren zum Herstellen schwammartiger Produkte

摘要

1,144,552. Tobacco smoke filters. FMC CORP. 23 Feb., 1966 [1 March, 1965; 14 Feb., 1966], No. 7838/66. Heading A2C. [Also in Divisions A5 and C3] A cigarette filter is moulded from a freeze-dried collagen dispersion (see Division C3).