Global Patent Index - EP 0816558 B1

EP 0816558 B1 2001-12-05 - Process for increasing the degree of whiteness of paper making stock from recycled paper

Title (en)

Process for increasing the degree of whiteness of paper making stock from recycled paper

Title (de)

Verfahren zur Erhöhung des Weissgrades von aus Altpapier gewonnenem Papierfaserstoff

Title (fr)

Procédé d'amélioration du dégré de blancheur de pâte à papier à partir de papier recyclé

Publication

EP 0816558 B1 (DE)

Application

EP 97108991 A

Priority

DE 19626200 A

Abstract (en)

[origin: DE19626200A1] The whiteness of paper fibre, in an aqueous suspension containing at least 5% dry material, is increased by the use of oxidising bleaches, the bleaching action being further increased by molecular O2. The process takes place under excess pressure of at least 0.1 bar and the gas used contains 50% O2 at the most.

IPC 1-7 (main, further and additional classification)

D21C 9/147

IPC 8 full level (invention and additional information)

D21C 9/147 (2006.01); D21C 9/16 (2006.01)

CPC (invention and additional information)

D21C 9/147 (2013.01); D21C 9/163 (2013.01)

Designated contracting state (EPC)

AT FR GB SE

EPO simple patent family

DE 19626200 A1 19970515; DE 19626200 C2 20010201; AT 210217 T 20011215; CA 2208940 A1 19971229; EP 0816558 A1 19980107; EP 0816558 B1 20011205

INPADOC legal status


2008-04-30 [PG25 FR] LAPSED IN A CONTRACTING STATE ANNOUNCED VIA POSTGRANT INFORM. FROM NAT. OFFICE TO EPO

- Ref Country Code: FR

- Free text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

- Effective date: 20060630

2007-04-27 [REG FR ST] NOTIFICATION OF LAPSE

- Effective date: 20070228

2007-02-28 [GBPC] GB: EUROPEAN PATENT CEASED THROUGH NON-PAYMENT OF RENEWAL FEE

- Effective date: 20060604

2007-02-20 [EUG] SE: EUROPEAN PATENT HAS LAPSED

2006-06-05 [PG25 SE] LAPSED IN A CONTRACTING STATE ANNOUNCED VIA POSTGRANT INFORM. FROM NAT. OFFICE TO EPO

- Ref Country Code: SE

- Free text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

- Effective date: 20060605

2006-06-04 [PG25 AT] LAPSED IN A CONTRACTING STATE ANNOUNCED VIA POSTGRANT INFORM. FROM NAT. OFFICE TO EPO

- Ref Country Code: AT

- Free text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

- Effective date: 20060604

2006-06-04 [PG25 GB] LAPSED IN A CONTRACTING STATE ANNOUNCED VIA POSTGRANT INFORM. FROM NAT. OFFICE TO EPO

- Ref Country Code: GB

- Free text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

- Effective date: 20060604

2005-06-15 [PGFP AT] POSTGRANT: ANNUAL FEES PAID TO NATIONAL OFFICE

- Ref Country Code: AT

- Payment date: 20050615

- Year of fee payment: 9

2005-06-14 [PGFP SE] POSTGRANT: ANNUAL FEES PAID TO NATIONAL OFFICE

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- Payment date: 20050614

- Year of fee payment: 9

2005-06-10 [PGFP FR] POSTGRANT: ANNUAL FEES PAID TO NATIONAL OFFICE

- Ref Country Code: FR

- Payment date: 20050610

- Year of fee payment: 9

2005-05-25 [PGFP GB] POSTGRANT: ANNUAL FEES PAID TO NATIONAL OFFICE

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- Payment date: 20050525

- Year of fee payment: 9

2002-11-27 [26N] NO OPPOSITION FILED

2002-02-15 [ET] FR: TRANSLATION FILED

2002-01-02 [GBT] GB: TRANSLATION OF EP PATENT FILED (GB SECTION 77(6)(A)/1977)

- Effective date: 20011206

2002-01-01 [REG GB IF02] EUROPEAN PATENT IN FORCE AS OF 2002-01-01

2001-12-05 [AK] DESIGNATED CONTRACTING STATES:

- Kind Code of Ref Document: B1

- Designated State(s): AT FR GB SE

2001-12-05 [REF] CORRESPONDS TO:

- Document: AT 210217 T 20011215

2001-08-23 [REG DE 8566] DESIGNATED COUNTRY DE NOT LONGER VALID

2001-07-18 [RBV] DESIGNATED CONTRACTING STATES (CORRECTION)

- Designated State(s): AT FR GB SE

2001-03-21 [RTI1] TITLE (CORRECTION)

- Free text: PROCESS FOR INCREASING THE DEGREE OF WHITENESS OF PAPER MAKING STOCK FROM RECYCLED PAPER

2001-02-28 [RTI1] TITLE (CORRECTION)

- Free text: PROCESS FOR INCREASING THE DEGREE OF WHITENESS OF PAPER MAKING STOCK FROM RECYCLED PAPER

2001-02-07 [RTI1] TITLE (CORRECTION)

- Free text: PROCESS FOR INCREASING THE DEGREE OF WHITENESS OF PAPER MAKING STOCK FROM RECYCLED PAPER

2000-01-26 [17Q] FIRST EXAMINATION REPORT

- Effective date: 19991210

1998-09-16 [AKX] PAYMENT OF DESIGNATION FEES

- Free text: AT DE FR GB SE

1998-09-16 [RBV] DESIGNATED CONTRACTING STATES (CORRECTION)

- Designated State(s): AT DE FR GB SE

1998-09-02 [17P] REQUEST FOR EXAMINATION FILED

- Effective date: 19980707

1998-01-07 [AK] DESIGNATED CONTRACTING STATES:

- Kind Code of Ref Document: A1

- Designated State(s): AT FR GB SE