(19)

(11)

EP 0 073 221 A1

(12)

(43) Date of publication: 09.03.1983 Bulletin 1983/10 (21) Application number: 82900730.0 (22) Date of filing: 21.01.1982

(51) International Patent Classification (IPC):  C25D 3/ 56( . ) C25D 5/ 04( . ) (86) International application number: PCT/US1982/000070 (87) International publication number: WO 1982/003095 (16.09.1982 Gazette 1982/22)

(84) Designated Contracting States: AT BE CH DE FR GB LI LU NL SE (30) Priority: 09.03.1981 US 19810241663 (71) Applicant: BATTELLE DEVELOPMENT CORPORATION Columbus Ohio 43201 (US)	(72) Inventor: SCHAER, Glenn R. Columbus, OH 43212 (US) (74) Representative: Dousse, Blasco, et al  7, route de Drize CH-1227 Carouge/Genève CH-1227 Carouge/Genève (CH)