(19)

(11)

EP 0 783 649 A1

(12)

(43) Date of publication: 16.07.1997 Bulletin 1997/29 (21) Application number: 95924060.0 (22) Date of filing: 23.06.1995

(51) International Patent Classification (IPC):  G01N 21/ 05( . ) G01N 21/ 25( . ) (86) International application number: PCT/US1995/007993 (87) International publication number: WO 1997/001061 (09.01.1997 Gazette 1997/03)

(84) Designated Contracting States: DE FR GB IT NL (71) Applicant: Alexay, Christopher C. Walpole, NH 03608 (US)	(72) Inventor: Alexay, Christopher C. Walpole, NH 03608 (US) (74) Representative: Bailey, David Martin, et al  Brookes & Martin High Holborn House 52-54 High Holborn London WC1V 6SE London WC1V 6SE (GB)