(19)

(11)

EP 0 428 697 A1

(12)

(43) Date of publication: 29.05.1991 Bulletin 1991/22 (21) Application number: 90909298.0 (22) Date of filing: 08.06.1990

(51) International Patent Classification (IPC):  B22D 17/ 30( . ) B22D 39/ 00( . ) H02K 44/ 06( . ) B22D 35/ 00( . ) H02K 44/ 02( . ) H05B 6/ 32( . ) (86) International application number: PCT/US1990/003265 (87) International publication number: WO 1990/015468 (13.12.1990 Gazette 1990/28)

(84) Designated Contracting States: BE CH DE ES FR GB IT LI NL SE (30) Priority: 09.06.1989 US 19890364332 (71) Applicant: THE DOW CHEMICAL COMPANY Midland, Michigan 48640 (US)	(72) Inventor: KING, Harvey, L. Angleton, TX 77515 (US) (74) Representative: Smulders, Theodorus A.H.J., Ir., et al  Vereenigde Octrooibureaux Nieuwe Parklaan 97 NL-2587 BN 's-Gravenhage NL-2587 BN 's-Gravenhage (NL)