(19)

(11)

EP 0 726 808 A1

(12)

(43) Date of publication: 21.08.1996 Bulletin 1996/34 (21) Application number: 94930820.0 (22) Date of filing: 17.10.1994

(51) International Patent Classification (IPC):  G01N 1/ 00( . ) G01N 1/ 22( . ) B01L 3/ 00( . ) (86) International application number: PCT/US1994/011881 (87) International publication number: WO 1996/006678 (07.03.1996 Gazette 1996/11)

(84) Designated Contracting States: DE FR GB IT SE (30) Priority: 01.09.1994 US 19940299687 (71) Applicant: W.L. GORE & ASSOCIATES, INC. Newark, Delaware 19714-9206 (US)	(72) Inventor: NARVAEZ, Richard Wilmington, DE 19803 (US) (74) Representative: McCallum, William Potter, et al  Cruikshank & Fairweather 19 Royal Exchange Square Glasgow G1 3AE Scotland Glasgow G1 3AE Scotland (GB)