(19)

(11)

EP 0 735 931 A1

(12)

(43) Date of publication: 09.10.1996 Bulletin 1996/41 (21) Application number: 95907962.0 (22) Date of filing: 22.12.1994

(51) International Patent Classification (IPC):  B22D 11/ 00( . ) B22D 11/ 06( . ) (86) International application number: PCT/US1994/014993 (87) International publication number: WO 1995/017274 (29.06.1995 Gazette 1995/27)

(84) Designated Contracting States: BE CH DE DK ES FR GB IT LI LU NL (30) Priority: 23.12.1993 US 19930173369 23.12.1993 US 19930173663 (71) Applicant: KAISER ALUMINUM & CHEMICAL CORPORATION Pleasanton, California 94566-7769 (US)	(72) Inventor: HARRINGTON, Donald G. Danville, CA 94526 (US) (74) Representative: West, Alan Harry, et al  R.G.C. Jenkins & Co. 26 Caxton Street London SW1H 0RJ London SW1H 0RJ (GB)