(19)

(11)

EP 0 435 931 A1

(12)

(43) Date of publication: 10.07.1991 Bulletin 1991/28 (21) Application number: 89910969.0 (22) Date of filing: 19.09.1989

(51) International Patent Classification (IPC):  A61L 15/ 00( . ) A61L 15/ 28( . ) B01J 20/ 00( . ) A61L 15/ 18( . ) B01D 61/ 00( . ) F26B 5/ 16( . ) (86) International application number: PCT/US1989/004074 (87) International publication number: WO 1990/003215 (05.04.1990 Gazette 1990/08)

(84) Designated Contracting States: AT BE CH DE FR GB IT LI LU NL SE (30) Priority: 22.09.1988 US 19880247828 (71) Applicant: ALLIED-SIGNAL INC. Morristown, NJ 07942-2245 (US)	(72) Inventor: WHITE, Lloyd, S. Arlington Heights, IL 60005 (US) (74) Representative: Brock, Peter William, et al  Urquhart-Dykes & Lord 1 Richfield Place Richfield Avenue Reading RG1 8EQ Berkshire Reading RG1 8EQ Berkshire (GB)