(19)

(11)

EP 0 076 301 A1

(12)

(43) Date of publication: 13.04.1983 Bulletin 1983/15 (21) Application number: 82901182.0 (22) Date of filing: 08.04.1982

(51) International Patent Classification (IPC):  G01N 21/ 31( . ) G01N 21/ 47( . ) (86) International application number: PCT/SE1982/000118 (87) International publication number: WO 1982/003688 (28.10.1982 Gazette 1982/26)

(84) Designated Contracting States: AT BE CH DE FR GB LI LU NL SE (30) Priority: 13.04.1981 US 19810253301 (71) Applicant: AB BONNIERFÖRETAGEN S-105 44 Stockholm (SE)	(72) Inventors: POPE, Daniel F. Issaquah, WA 98027 (US) HOKANSON, John V. Everett, WA 98204 (US) SULLIVAN, Robert R. Seattle, WA 98105 (US) VENALAINEN, Esko J. North Delta British Columbia V4C 4B5 (CA)