(19)

(11)

EP 0 695 227 A1

(12)

(43) Date of publication: 07.02.1996 Bulletin 1996/06 (21) Application number: 94914108.0 (22) Date of filing: 11.04.1994

(51) International Patent Classification (IPC):  B22C 7/ 02( . ) B22C 9/ 20( . ) B22C 9/ 10( . ) (86) International application number: PCT/US1994/003936 (87) International publication number: WO 1994/023863 (27.10.1994 Gazette 1994/24)

(84) Designated Contracting States: AT BE CH DE DK ES FR GB GR IE IT LI LU MC NL PT SE (30) Priority: 21.04.1993 US 19930052197 (71) Applicant: ASHLAND OIL, INC. Columbus, OH 43216 (US)	(72) Inventors: TORDOFF, William L. Dublin, OH 43017 (US) FU, Jiang Dublin, OH 43017 (US) (74) Representative: VOSSIUS & PARTNER  Siebertstrasse 4 D-81675 München D-81675 München (DE)