(19)

(11)

EP 0 621 854 A1

(12)

(43) Date of publication: 02.11.1994 Bulletin 1994/44 (21) Application number: 93904493.0 (22) Date of filing: 13.01.1993

(51) International Patent Classification (IPC):  B01D 53/ 34( . ) B01D 53/ 73( . ) C01B 17/ 60( . ) B01D 53/ 50( . ) B01D 53/ 77( . ) C01B 17/ 62( . ) (86) International application number: PCT/US1993/000319 (87) International publication number: WO 1993/014026 (22.07.1993 Gazette 1993/18)

(84) Designated Contracting States: DE ES FR GB (30) Priority: 13.01.1992 US 19920819288 (71) Applicants: HASEBE, Nobuyasu Rancho Palos Verde, CA 90274 (US) HASEBE, Nobukatsu Rancho Palos Verde, CA 90274 (US)	(72) Inventors: HASEBE, Nobuyasu Rancho Palos Verde, CA 90274 (US) HASEBE, Nobukatsu Rancho Palos Verde, CA 90274 (US) (74) Representative: Fiener, Josef  Patentanwälte Kahler, Käck, Fiener & Sturm P.O. Box 12 49 D-87712 Mindelheim D-87712 Mindelheim (DE)