(19)

(11)

EP 0 091 486 A1

(12)

(43) Date of publication: 19.10.1983 Bulletin 1983/42 (21) Application number: 82903542.0 (22) Date of filing: 14.10.1982

(51) International Patent Classification (IPC):  G01N 9/ 12( . ) (86) International application number: PCT/US1982/001475 (87) International publication number: WO 1983/001508 (28.04.1983 Gazette 1983/10)

(84) Designated Contracting States: AT BE CH DE FR GB LI LU NL SE (30) Priority: 14.10.1981 US 19810311439 (71) Applicants: YOUNG, Michael J Bakersfield, CA 93309 (US) BENTLEY, James K Bakersfield, CA 93306 (US) TONTI, Nicholas Bakersfield, CA 93309 (US)	(72) Inventors: YOUNG, Michael J Bakersfield, CA 93309 (US) BENTLEY, James K Bakersfield, CA 93306 (US) TONTI, Nicholas Bakersfield, CA 93309 (US)