(19)

(11)

EP 0 302 109 A1

(12)

(43) Date of publication: 08.02.1989 Bulletin 1989/06 (21) Application number: 88903492.0 (22) Date of filing: 17.02.1988

(51) International Patent Classification (IPC):  G01N 33/ 58( . ) G01N 33/ 68( . ) (86) International application number: PCT/US1988/000556 (87) International publication number: WO 1988/006293 (25.08.1988 Gazette 1988/19)

(84) Designated Contracting States: BE CH DE FR GB IT LI NL SE (30) Priority: 17.02.1987 US 19870014996 17.02.1987 US 19870015049 (71) Applicant: LEWIS, Donald G. Los Angeles, CA 90024 (US)	(72) Inventor: LEWIS, Donald G. Los Angeles, CA 90024 (US) (74) Representative: Hedley, Nicholas James Matthew, et al  Stephenson Harwood One, St. Paul's Churchyard London EC4M 8SH London EC4M 8SH (GB)