(19)

(11)

EP 1 319 175 A2

(12)

(88) Date of publication A3: 27.03.2003 (43) Date of publication: 18.06.2003 Bulletin 2003/25 (21) Application number: 01957160.3 (22) Date of filing: 17.07.2001

(51) International Patent Classification (IPC)7: G01N 1/28, G01N 23/20, G01N 23/223 (86) International application number: PCT/US0122/349 (87) International publication number: WO 0200/6792 (24.01.2002 Gazette 2002/04)

(84) Designated Contracting States: AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR Designated Extension States: AL LT LV MK RO SI (30) Priority: 18.07.2000 US 218777 P (71) Applicant: UOP LLC Des Plaines, IL 60017-5017 (US)

(72) Inventors: WENDELBO, Rune N-0314 Oslo (NO) AKPORIAYE, Duncan E. N-0314 Oslo (NO) DAHL, Ivar M. N-0314 Oslo (NO) KARLSSON, Arne N-0314 Oslo (NO) LEWIS, Gregory J.,UOP LLC Des Plaines, IL 60017-5017 (US) BEM, David S.,UOP LLC Des Plaines, IL 60017-5017 (US) RINGWELSKI, Andrew Z.,UOP LLC Des Plaines, IL 60017-5017 (US) MURRAY, Richard C., Jr.,UOP LLC Des Plaines, IL 60017-5017 (US) BRATU, Cheryl M.,UOP LLC Des Plaines, IL 60017-5017 (US) (74) Representative: Hayes, Adrian Chetwynd et al Boult Wade Tennant,Verulam Gardens70 Gray's Inn Road London WC1X 8BT London WC1X 8BT (GB)