(19)

(11)

EP 0 824 332 A1

(12)

(43) Date of publication: 25.02.1998 Bulletin 1998/09 (21) Application number: 96920150.0 (22) Date of filing: 08.05.1996

(51) International Patent Classification (IPC):  A47B 88/ 00( . ) A47F 9/ 00( . ) A47F 7/ 00( . ) (86) International application number: PCT/US1996/006482 (87) International publication number: WO 1996/035357 (14.11.1996 Gazette 1996/50)

(84) Designated Contracting States: AT BE CH DE ES FR GB IT LI NL (30) Priority: 08.05.1995 US 19950435052 07.06.1995 US 19950473686 25.09.1995 US 19950533418 13.11.1995 US 19950557781 (71) Applicant: SHELL OIL COMPANY Houston, Texas 77252-2463 (US)	(72) Inventor: TRYON, John, Frederick Houston, TX 77070 (US) (74) Representative: Price, Nigel John King  J.A. KEMP & CO. 14 South Square Gray's Inn London WC1R 5LX London WC1R 5LX (GB)