(19)

(11)

EP 0 457 865 A1

(12)

(43) Date of publication: 27.11.1991 Bulletin 1991/48 (21) Application number: 90916663.0 (22) Date of filing: 16.10.1990

(51) International Patent Classification (IPC):  C12S 3/ 08( . ) D21C 5/ 00( . ) D21C 9/ 12( . ) C12N 9/ 24( . ) D21C 9/ 10( . ) D21C 9/ 14( . ) (86) International application number: PCT/US1990/005933 (87) International publication number: WO 1991/005908 (02.05.1991 Gazette 1991/10)

(84) Designated Contracting States: AT BE CH DE DK ES FR GB GR IT LI LU NL SE (30) Priority: 18.10.1989 US 19890423239 (71) Applicant: INTERNATIONAL PAPER COMPANY Tuxedo, NY 10987 (US)	(72) Inventors: BHATTACHARJEE, Shyam, S. Monroe, NY 10950 (US) DeWITT, Doraine, M. Middletown, NY 10940 (US) FOOKES, Wilfrid, Jr. New Windsor, NY 12550 (US) OLSEN, William, L. Warwick, NY 10990 (US) (74) Representative: VOSSIUS & PARTNER  Postfach 86 07 67 D-81634 München D-81634 München (DE)