(19)

(11)

EP 0 607 262 A1

(12)

(43) Date of publication: 27.07.1994 Bulletin 1994/30 (21) Application number: 92921444.0 (22) Date of filing: 06.10.1992

(51) International Patent Classification (IPC):  B01L 3/ 00( . ) C30B 7/ 00( . ) G01N 35/ 00( . ) B01L 3/ 06( . ) C30B 29/ 58( . ) (86) International application number: PCT/US1992/008296 (87) International publication number: WO 1993/007311 (15.04.1993 Gazette 1993/10)

(84) Designated Contracting States: AT BE CH DE DK ES FR GB GR IE IT LI LU MC NL PT SE (30) Priority: 09.10.1991 US 19910774766 17.01.1992 US 19920822504 (71) Applicant: SCHERING CORPORATION Kenilworth New Jersey 07033 (US)	(72) Inventors: KENYON, David, J. Morristown, NJ 07960 (US) KUSHNER, Harold, K. West Orange, NJ 07052 (US) MAHESHWARI, Rajesh, K. Millburn, NJ 07041 (US) PERLE, Abe, J. Verona, NJ 07044 (US) REICHERT, Paul Montville, NJ 07045 (US) SOCHON, Henry, R. Clifton, NJ 07013 (US) (74) Representative: Ritter, Stephen David  Mathys & Squire 100 Grays Inn Road London WC1X 8AL London WC1X 8AL (GB)