Finnegan, Henderson, Farabow, Garrett & Dunner
Blood-purifying membrane
 A blood-purifying regenerated cellulose membrane, in which the occurrence of the leukopenia phenomenon and the activation of the complement system are moderated, is prepared by applying a solution of a polymeric substance comprising as one component units derived from one or more basic vinyl monomers having an amino group in the side chain in an organic solvent to a regenerated cellulose membrane, removing the excessive solution, and then fixing the polymeric substance to the regenerated cellulose membrane. 
Asahi Kasei Kogyo Kabushiki Kaisha
B B A
B01D B01D A61L
inventional inventional inventional
Kazushige Tetsuo Kazuo Hiroo
Seita Watanabe Imamura Nakano