(19)

(11)

EP 0 199 815 A1

(12)

(43) Date of publication: 05.11.1986 Bulletin 1986/45 (21) Application number: 85905972.0 (22) Date of filing: 01.11.1985

(51) International Patent Classification (IPC):  B01D 53/ 14( . ) C01B 17/ 05( . ) B01D 53/ 52( . ) (86) International application number: PCT/US1985/002179 (87) International publication number: WO 1986/002628 (09.05.1986 Gazette 1986/10)

(84) Designated Contracting States: AT BE CH DE FR GB IT LI LU NL SE (30) Priority: 04.11.1984 US 19840657809 (71) Applicant: THE REGENTS OF THE UNIVERSITY OF CALIFORNIA Berkeley, California 94720 (US)	(72) Inventor: LYNN, Scott Walnut Creek, CA 94598 (US)