(19)

(11)

EP 0 815 060 A1

(12)

(43) Date of publication: 07.01.1998 Bulletin 1998/02 (21) Application number: 96908554.0 (22) Date of filing: 15.03.1996

(51) International Patent Classification (IPC):  C02F 5/ 00( . ) C02F 5/ 10( . ) C02F 5/ 08( . ) C02F 5/ 14( . ) (86) International application number: PCT/US1996/002698 (87) International publication number: WO 1996/029291 (26.09.1996 Gazette 1996/43)

(84) Designated Contracting States: AT BE CH DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE Designated Extension States: AL LT LV SI (30) Priority: 17.03.1995 US 19950405962 (71) Applicant: BUCKMAN LABORATORIES INTERNATIONAL, INC. Memphis TN 38108-0305 (US)	(72) Inventors: HOEKSTRA, P., M. Cordova, TN 38018 (US) YATES, C., W. Memphis, TN 38126 (US) (74) Representative: Matthews, Derek Peter  Frank B. Dehn & Co., European Patent Attorneys, 179 Queen Victoria Street London EC4V 4EL London EC4V 4EL (GB)