(19)

(11)

EP 0 430 992 A1

(12)

(43) Date of publication: 12.06.1991 Bulletin 1991/24 (21) Application number: 89909285.0 (22) Date of filing: 31.07.1989

(51) International Patent Classification (IPC):  G03F 7/ 027( . ) B22C 9/ 04( . ) G03F 7/ 00( . ) B22C 7/ 02( . ) B29C 67/ 00( . ) (86) International application number: PCT/US1989/003303 (87) International publication number: WO 1990/001727 (22.02.1990 Gazette 1990/05)

(84) Designated Contracting States: AT BE CH DE FR GB IT LI LU NL SE (30) Priority: 08.08.1988 US 19880229476 07.07.1989 US 19890376612 (71) Applicant: DeSoto, Inc. Des Plaines Illinois 60017 (US)	(72) Inventors: MURPHY, Edward, J. Mount Prospect, IL 60056 (US) ANSEL, Robert, E. Hoffman Estates, IL 60194 (US) KRAJEWSKI, John, J. Wheeling, IL 60090 (US) (74) Representative: den Hartog, Jeroen Hendrikus Joseph  STAMICARBON B.V. Octrooiafdeling P.O. Box 605 6160 AP Geleen 6160 AP Geleen (NL)