(19)

(11)

EP 0 466 765 A1

(12)

(43) Date of publication: 22.01.1992 Bulletin 1992/04 (21) Application number: 90905765.0 (22) Date of filing: 26.03.1990

(51) International Patent Classification (IPC):  G01N 33/ 53( . ) G01N 33/ 569( . ) G01N 33/ 531( . ) (86) International application number: PCT/US1990/001615 (87) International publication number: WO 1990/011522 (04.10.1990 Gazette 1990/23)

(84) Designated Contracting States: AT BE CH DE DK ES FR GB IT LI LU NL SE (30) Priority: 27.03.1989 US 19890328824 (71) Applicants: MILLER, Suzanne M Cinnaminson, NJ 08077 (US) PETERSEN, Frank P Burlington, NJ 08016 (US)	(72) Inventors: MILLER, Suzanne M Cinnaminson, NJ 08077 (US) PETERSEN, Frank P Burlington, NJ 08016 (US) (74) Representative: Hirsch, Marc-Roger, et al  Cabinet Hirsch 34 rue de Bassano F-75008 Paris F-75008 Paris (FR)