(19)

(11)

EP 0 035 493 A1

(12)

(43) Date of publication: 16.09.1981 Bulletin 1981/37 (21) Application number: 80900274.0 (22) Date of filing: 05.09.1979

(51) International Patent Classification (IPC):  C02F 3/ 12( . ) C02F 3/ 20( . ) (86) International application number: PCT/US1979/000687 (87) International publication number: WO 1981/000709 (19.03.1981 Gazette 1981/07)

(84) Designated Contracting States: AT CH DE FR GB LU NL SE (71) Applicant: ETLIN, Vladimir N. Falls Church, VA 22043 (US)	(72) Inventor: ETLIN, Vladimir N. Falls Church, VA 22043 (US)