(19)

(11)

EP 0 801 545 A1

(12)

(43) Date of publication: 22.10.1997 Bulletin 1997/43 (21) Application number: 94917402.0 (22) Date of filing: 12.05.1994

(51) International Patent Classification (IPC):  A61C 13/ 24( . ) (86) International application number: PCT/US1994/005452 (87) International publication number: WO 1995/031153 (23.11.1995 Gazette 1995/50)

(84) Designated Contracting States: AT BE CH DE DK ES FR GB GR IE IT LI LU MC NL PT SE (71) Applicant: Hazen, Anthony P. Tulsa, OK 74135-4816 (US)	(72) Inventor: Hazen, Anthony P. Tulsa, OK 74135-4816 (US) (74) Representative: Allen, William Guy Fairfax  J.A. KEMP & CO. 14 South Square Gray's Inn London WC1R 5LX London WC1R 5LX (GB)