(19)

(11)

EP 0 573 585 A1

(12)

(43) Date of publication: 15.12.1993 Bulletin 1993/50 (21) Application number: 92907909.0 (22) Date of filing: 25.02.1992

(51) International Patent Classification (IPC):  C25D 9/ 06( . ) C25D 11/ 30( . ) C23C 22/ 57( . ) (86) International application number: PCT/US1992/001495 (87) International publication number: WO 1992/014868 (03.09.1992 Gazette 1992/23)

(84) Designated Contracting States: AT BE CH DE DK ES FR GB GR IT LI LU MC NL SE (30) Priority: 26.02.1991 US 19910661503 (71) Applicant: TECHNOLOGY APPLICATIONS GROUP, INC. Grand Forks, ND 58201 (US)	(72) Inventors: BARTAK, Duane E. Grand Forks, ND 58201 (US) LEMIEUX, Brian E. East Grand Forks, MN 56721 (US) WOOLSEY, Earl R. Grand Forks, ND 58201 (US) (74) Representative: Rambelli, Paolo, et al  c/o JACOBACCI & PERANI S.p.A. Corso Regio Parco, 27 I-10152 Torino I-10152 Torino (IT)