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(11)

EP 1 272 708 A1

(12)

(43) Date of publication: 08.01.2003 Bulletin 2003/02 (21) Application number: 00923270.3 (22) Date of filing: 12.04.2000

(51) International Patent Classification (IPC)7: D21H 21/16, D21H 17/74 // (D21H17/16, 17:17, 17:23, 17:29, 17:66) (86) International application number: PCT/US0009/762 (87) International publication number: WO 0203/3172 (25.04.2002 Gazette 2002/17)

(84) Designated Contracting States: AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE Designated Extension States: AL LT LV MK RO SI (71) Applicant: HERCULES INCORPORATED Wilmington,Delaware 19894-0001 (US)	(72) Inventor: LIN, Tingdong Wilmington, DE 19808 (US) (74) Representative: HOFFMANN - EITLE  Patent- und RechtsanwälteArabellastrasse 4 81925 München 81925 München (DE)