(19)
(11)
EP 0 404 788 A1
(12)
(43)
Date of publication:
02.01.1991
Bulletin 1991/01
(21)
Application number:
89903035.0
(22)
Date of filing:
17.03.1989
(51)
International Patent Classification (IPC):
C01D
1/
42
( . )
C01F
7/
14
( . )
C23F
11/
18
( . )
C01F
7/
06
( . )
C23F
11/
06
( . )
(86)
International application number:
PCT/AU1989/000105
(87)
International publication number:
WO 1989/008728
(
21.09.1989
Gazette 1989/23)
(84)
Designated Contracting States:
DE FR GB IT
(30)
Priority:
17.03.1988
AU 19880007361
(71)
Applicant:
COMALCO LIMITED
Melbourne, VIC 3000 (AU)
(72)
Inventor:
MAY, Robin, Frank
Greensborough, VIC 3088 (AU)
(74)
Representative:
Hallybone, Huw George, et al
CARPMAELS AND RANSFORD 43 Bloomsbury Square
London WC1A 2RA
London WC1A 2RA (GB)
(54)
METALLIC SURFACE PROTECTION