(19)
(11) EP 0 668 940 A1

(12)

(43) Date of publication:
30.08.1995 Bulletin 1995/35

(21) Application number: 94922206.0

(22) Date of filing: 21.07.1994
(51) International Patent Classification (IPC): 
C21D 1/ 82( . )
C25F 1/ 06( . )
(86) International application number:
PCT/CA1994/000400
(87) International publication number:
WO 1995/003439 (02.02.1995 Gazette 1995/06)
(84) Designated Contracting States:
AT BE CH DE DK ES FR GB GR IE IT LI LU MC NL PT SE

(30) Priority: 21.07.1993 US 19930095689
28.06.1994 US 19940266673

(71) Applicant: Dynamotive Corporation
Vancouver, British Columbia V6S 2L2 (CA)

(72) Inventors:
  • OEHR, Klaus, H.
    Surrey, British Columbia V4P 1M6 (CA)
  • DONAHUE, Harvey
    New Westminster, British Columbia V3M 6L (CA)
  • HOY, Brenda
    New Westminster, British Columbia V3M 6L (CA)
  • TIMEWELL, Richard, R.
    Vancouver, British Columbia V6P 4H3 (CA)
  • KIM, Ronald
    Vancouver, British Columbia V6P 4H3 (CA)
  • ROTH, Reinhold, C.
    Vancouver, British Columbia V6H 3YA (CA)

(74) Representative: Moore, Anthony John 
Gee & Co. Chancery House Chancery Lane
London WC2A 1QU
London WC2A 1QU (GB)

   


(54) A METHOD FOR REMOVAL OF CERTAIN OXIDE FILMS FROM METAL SURFACES