(19)

(11)

EP 0 879 211 A1

(12)

(43) Date of publication: 25.11.1998 Bulletin 1998/48 (21) Application number: 96938820.0 (22) Date of filing: 08.11.1996

(51) International Patent Classification (IPC):  C01B 7/ 19( . ) (86) International application number: PCT/US1996/017924 (87) International publication number: WO 1997/018158 (22.05.1997 Gazette 1997/22)

(84) Designated Contracting States: AT BE CH DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE (30) Priority: 13.11.1995 US 19950555659 (71) Applicant: AlliedSignal Inc. Morristown, New Jersey 07962-2245 (US)	(72) Inventors: KUNKEL, Paul, Frederick Cheektowaga, NY 14225 (US) REDMON, Charles, Lewis Orchard Park, NY 14127 (US) SUBBANNA, Somanahalli, Naranappa East Amherst, NY 14051 (US) (74) Representative: Hucker, Charlotte Jane  Gill Jennings & Every Broadgate House, 7 Eldon Street London EC2M 7LH London EC2M 7LH (GB)