(19)

(11)

EP 0 702 732 A1

(12)

(43) Date of publication: 27.03.1996 Bulletin 1996/13 (21) Application number: 94916808.0 (22) Date of filing: 25.05.1994

(51) International Patent Classification (IPC):  D01F 1/ 10( . ) D01F 6/ 94( . ) D01F 6/ 70( . ) (86) International application number: PCT/US1994/005713 (87) International publication number: WO 1994/029499 (22.12.1994 Gazette 1994/28)

(84) Designated Contracting States: DE FR GB IT (30) Priority: 11.06.1993 US 19930075702 (71) Applicant: E.I. DU PONT DE NEMOURS AND COMPANY Wilmington Delaware 19898 (US)	(72) Inventors: JACOBSON, Howard, Wayne Wilmington, DE 19810 (US) GOODRICH, Charles, William Waynesboro, VA 22980 (US) (74) Representative: Woodman, Derek, et al  Frank B. Dehn & Co. European Patent Attorneys Imperial House 15-19 Kingsway London WC2B 6UZ London WC2B 6UZ (GB)