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Current content: 155 395 919 patent documents

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132 468 new documents added

1 248 785 documents amended

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EP 0112377 B1 19861112 - OZONE BLEACHING OF CELLULOSIC MATERIALS

Title (en)

OZONE BLEACHING OF CELLULOSIC MATERIALS

Publication

EP 0112377 B1 19861112 (EN)

Application

EP 83902324 A 19830601

Priority

US 39174782 A 19820624

Abstract (en)

[origin: WO8400181A1] In a process for bleaching lignocellulosic pulp with ozone, irradiation of the pulp with ultraviolet light enhances the efficiency of the ozone and the bleachability of the pulp.

IPC 1-7

D21C 9/10

IPC 8 full level

D21C 9/10 (2006.01)

CPC (source: EP)

D21C 9/1015 (2013.01); D21C 9/1073 (2013.01)

Designated contracting state (EPC)

FR GB SE

DOCDB simple family (publication)

WO 8400181 A1 19840119; AU 1770283 A 19840126; AU 593763 B2 19900222; CA 1186105 A 19850430; EP 0112377 A1 19840704; EP 0112377 B1 19861112; FI 73252 B 19870529; FI 73252 C 19870910; FI 840697 A0 19840221; FI 840697 A 19840221

DOCDB simple family (application)

US 8300820 W 19830601; AU 1770283 A 19830701; CA 430647 A 19830617; EP 83902324 A 19830601; FI 840697 A 19840221