(19)

(11)

EP 0 041 948 A1

(12)

(43) Date of publication: 23.12.1981 Bulletin 1981/51 (21) Application number: 80900883.0 (22) Date of filing: 10.12.1979

(51) International Patent Classification (IPC):  B01L 3/ 02( . ) (86) International application number: PCT/US1979/001081 (87) International publication number: WO 1981/001666 (25.06.1981 Gazette 1981/15)

(84) Designated Contracting States: AT CH DE FR GB LU NL SE (71) Applicant: INDICON, INC. Brookfield Center, CT 06085 (US)	(72) Inventor: CITRIN, Paul S. Danbury, CT 06810 (US)