(19)

(11)

EP 0 172 242 A1

(12)

(43) Date of publication: 26.02.1986 Bulletin 1986/09 (21) Application number: 85901277.0 (22) Date of filing: 26.02.1985

(51) International Patent Classification (IPC):  G01N 15/ 14( . ) G01N 21/ 00( . ) (86) International application number: PCT/US1985/000314 (87) International publication number: WO 1985/004014 (12.09.1985 Gazette 1985/20)

(84) Designated Contracting States: DE FR GB (30) Priority: 29.02.1984 AU 19840003841 (71) Applicant: Research Corporation New York New York 10004 (US)	(72) Inventor: BOEHMER, Ralph-Michael St. Kilda, VIC 3182 (AU)