(19)

(11)

EP 0 383 829 A1

(12)

(43) Date of publication: 29.08.1990 Bulletin 1990/35 (21) Application number: 89900090.0 (22) Date of filing: 26.10.1988

(51) International Patent Classification (IPC):  G01J 3/ 443( . ) G01N 21/ 72( . ) G01N 30/ 74( . ) G01N 21/ 71( . ) G01N 21/ 35( . ) (86) International application number: PCT/US1988/003798 (87) International publication number: WO 1989/003980 (05.05.1989 Gazette 1989/10)

(84) Designated Contracting States: AT BE CH DE FR GB IT LI LU NL SE (30) Priority: 26.10.1987 US 19870120050 (71) Applicant: RESEARCH CORPORATION TECHNOLOGIES, INC. Tucson Arizona 85710-2815 (US)	(72) Inventors: BUSCH, Kenneth, W. Waco, TX 76710 (US) HUDSON, M., Keith Springfield, MO 65807 (US) (74) Representative: Hansen, Bernd, Dr. Dipl.-Chem., et al  Hoffmann, Eitle & Partner Patent- und Rechtsanwälte, Postfach 81 04 20 D-81904 München D-81904 München (DE)