(19)

(11)

EP 0 604 410 A1

(12)

(43) Date of publication: 06.07.1994 Bulletin 1994/27 (21) Application number: 91913210.0 (22) Date of filing: 19.07.1991

(51) International Patent Classification (IPC):  B01D 17/ 02( . ) B01D 27/ 10( . ) B01D 36/ 00( . ) F02B 1/ 04( . ) F02M 37/ 00( . ) B01D 17/ 12( . ) B01D 35/ 26( . ) F02M 37/ 22( . ) F02D 33/ 00( . ) (86) International application number: PCT/US1991/004995 (87) International publication number: WO 1993/001874 (04.02.1993 Gazette 1993/04)

(84) Designated Contracting States: CH DE FR GB IT LI (71) Applicant: WINN-COLEMAN, INC. Houston, TX 77060-3149 (US)	(72) Inventor: WINN, Houston Cleveland, TX 77327 (US) (74) Representative: Allen, William Guy Fairfax  J.A. KEMP & CO. 14, South Square Gray's Inn London WC1R 5LX London WC1R 5LX (GB)