(19)

(11)

EP 0 607 153 A1

(12)

(43) Date of publication: 27.07.1994 Bulletin 1994/30 (21) Application number: 92914865.0 (22) Date of filing: 12.06.1992

(51) International Patent Classification (IPC):  C01B 7/ 01( . ) C02F 1/ 50( . ) C02F 1/ 02( . ) C02F 1/ 76( . ) (86) International application number: PCT/US1992/005073 (87) International publication number: WO 1993/006048 (01.04.1993 Gazette 1993/09)

(84) Designated Contracting States: AT BE CH DE DK ES FR GB GR IT LI LU MC NL SE (30) Priority: 20.09.1991 US 19910763185 (71) Applicant: MASON, James A Theodore, AL 36590 (US)	(72) Inventor: MASON, James A Theodore, AL 36590 (US) (74) Representative: Portal, Gérard, et al  Cabinet Beau de Loménie 158, rue de l'Université F-75340 Paris Cédex 07 F-75340 Paris Cédex 07 (FR)