EP0679760B1 - Procédé pour le blanchiment de pâte à papier contenant de la lignocellulose - Google Patents

Procédé pour le blanchiment de pâte à papier contenant de la lignocellulose Download PDF

Info

Publication number
EP0679760B1
EP0679760B1 EP94203640A EP94203640A EP0679760B1 EP 0679760 B1 EP0679760 B1 EP 0679760B1 EP 94203640 A EP94203640 A EP 94203640A EP 94203640 A EP94203640 A EP 94203640A EP 0679760 B1 EP0679760 B1 EP 0679760B1
Authority
EP
European Patent Office
Prior art keywords
pulp
magnesium
calcium
compound
chlorine
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP94203640A
Other languages
German (de)
English (en)
Other versions
EP0679760A1 (fr
Inventor
Lennart Andersson
Jiri Basta
Lillemor Holtinger
Jan Höök
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nouryon Pulp and Performance Chemicals AB
Original Assignee
Eka Chemicals AB
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=20382601&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0679760(B1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Eka Chemicals AB filed Critical Eka Chemicals AB
Publication of EP0679760A1 publication Critical patent/EP0679760A1/fr
Application granted granted Critical
Publication of EP0679760B1 publication Critical patent/EP0679760B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21C—PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE-CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR
    • D21C9/00—After-treatment of cellulose pulp, e.g. of wood pulp, or cotton linters ; Treatment of dilute or dewatered pulp or process improvement taking place after obtaining the raw cellulosic material and not provided for elsewhere
    • D21C9/10—Bleaching ; Apparatus therefor
    • D21C9/16—Bleaching ; Apparatus therefor with per compounds
    • D21C9/163—Bleaching ; Apparatus therefor with per compounds with peroxides
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21C—PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE-CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR
    • D21C9/00—After-treatment of cellulose pulp, e.g. of wood pulp, or cotton linters ; Treatment of dilute or dewatered pulp or process improvement taking place after obtaining the raw cellulosic material and not provided for elsewhere
    • D21C9/10—Bleaching ; Apparatus therefor
    • D21C9/1005—Pretreatment of the pulp, e.g. degassing the pulp
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21C—PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE-CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR
    • D21C9/00—After-treatment of cellulose pulp, e.g. of wood pulp, or cotton linters ; Treatment of dilute or dewatered pulp or process improvement taking place after obtaining the raw cellulosic material and not provided for elsewhere
    • D21C9/10—Bleaching ; Apparatus therefor
    • D21C9/1026—Other features in bleaching processes
    • D21C9/1036—Use of compounds accelerating or improving the efficiency of the processes
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21C—PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE-CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR
    • D21C9/00—After-treatment of cellulose pulp, e.g. of wood pulp, or cotton linters ; Treatment of dilute or dewatered pulp or process improvement taking place after obtaining the raw cellulosic material and not provided for elsewhere
    • D21C9/10—Bleaching ; Apparatus therefor
    • D21C9/147—Bleaching ; Apparatus therefor with oxygen or its allotropic modifications
    • D21C9/153—Bleaching ; Apparatus therefor with oxygen or its allotropic modifications with ozone

Claims (9)

  1. Procédé de délignification et de blanchiment de pâte à papier contenant de la lignocellulose, qui a été soumise à une digestion par voie chimique, procédé dans lequel on traite la pâte avec un acide, à un pH compris dans l'intervalle allant d'environ 1 à environ 6, et on lave la pâte après le traitement par un acide, caractérisé en ce que l'on ajoute ensuite un mélange soluble dans l'eau d'un dérivé du magnésium et d'un dérivé du calcium, à un pH compris dans l'intervalle allant d'environ 1 à environ 7 et en une quantité comprise entre environ 0,5 et environ 10 kg par tonne de pâte sèche, ladite quantité étant calculée en magnésium et en calcium, et en ce que la pâte est ensuite délignifiée et blanchie au moyen d'un agent de blanchiment exempt de chlore, renfermant du peroxyde d'hydrogène, à un pH compris dans l'intervalle allant d'environ 8 à environ 12.
  2. Procédé selon la revendication 1, caractérisé en ce que le mélange soluble dans l'eau d'un dérivé du magnésium et d'un dérivé du calcium est ajouté en une quantité comprise entre environ 2 et environ 10 kg par tonne de pâte sèche, ladite quantité étant calculée en magnésium et en calcium.
  3. Procédé selon la revendication 1, caractérisé en ce que la pâte qui a été soumise à une digestion par voie chimique, est une pâte au sulfate.
  4. Procédé selon la revendication 1, caractérisé en ce que le mélange soluble dans l'eau d'un dérivé du magnésium et d'un dérivé du calcium est ajouté à un pH compris entre 2 et 6.
  5. Procédé selon la revendication 1, caractérisé en ce que le dérivé du calcium est le chlorure de calcium ou l'oxyde de calcium.
  6. Procédé selon la revendication 1 ou 5, caractérisé en ce que le dérivé du magnésium est le sulfate de magnésium ou le chlorure de magnésium.
  7. Procédé selon la revendication 1, caractérisé en ce que l'agent de blanchiment exempt de chlore est constitué d'oxygène et de peroxyde d'hydrogène.
  8. Procédé selon la revendication 7, caractérisé en ce que, après le traitement, la pâte est soumise à un blanchiment final par l'ozone, en une ou plusieurs étapes.
  9. Procédé selon l'une quelconque des revendications 1 à 8, caractérisé en ce que l'on réalise le traitement par un acide à une température comprise dans l'intervalle allant d'environ 10 à environ 95 °C, pendant une durée allant d'environ 1 à environ 120 minutes, en ce que le mélange d'un dérivé du magnésium et d'un dérivé du calcium est ajouté à une température comprise dans l'intervalle allant d'environ 10 à environ 95 °C, en un laps de temps allant d'environ 1 à environ 180 minutes et en une quantité comprise dans l'intervalle allant de 0,5 à 5 kg par tonne de pâte sèche, ladite quantité étant calculée en magnésium et en calcium et la pâte traitée ayant une concentration d'environ 3 à environ 35 % en poids, et en ce que la pâte est blanchie et délignifiée au moyen de peroxyde d'hydrogène, à un pH compris dans l'intervalle allant d'environ 8 à environ 12.
EP94203640A 1991-04-30 1992-04-08 Procédé pour le blanchiment de pâte à papier contenant de la lignocellulose Expired - Lifetime EP0679760B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
SE9101301A SE470065C (sv) 1991-04-30 1991-04-30 Behandling av kemisk massa med en syra och därefter en magnesium- och kalciumförening vid klorfri blekning
SE9101301 1991-04-30
EP92201005A EP0511695B2 (fr) 1991-04-30 1992-04-08 Procédé pour le blanchiment de pâte à papier contenant de la lignocellulose

Related Parent Applications (2)

Application Number Title Priority Date Filing Date
EP92201005A Division EP0511695B2 (fr) 1991-04-30 1992-04-08 Procédé pour le blanchiment de pâte à papier contenant de la lignocellulose
EP92201005.3 Division 1992-04-08

Publications (2)

Publication Number Publication Date
EP0679760A1 EP0679760A1 (fr) 1995-11-02
EP0679760B1 true EP0679760B1 (fr) 1998-11-18

Family

ID=20382601

Family Applications (2)

Application Number Title Priority Date Filing Date
EP94203640A Expired - Lifetime EP0679760B1 (fr) 1991-04-30 1992-04-08 Procédé pour le blanchiment de pâte à papier contenant de la lignocellulose
EP92201005A Expired - Lifetime EP0511695B2 (fr) 1991-04-30 1992-04-08 Procédé pour le blanchiment de pâte à papier contenant de la lignocellulose

Family Applications After (1)

Application Number Title Priority Date Filing Date
EP92201005A Expired - Lifetime EP0511695B2 (fr) 1991-04-30 1992-04-08 Procédé pour le blanchiment de pâte à papier contenant de la lignocellulose

Country Status (14)

Country Link
EP (2) EP0679760B1 (fr)
JP (1) JP2592747B2 (fr)
AT (2) ATE173518T1 (fr)
BR (1) BR9201554A (fr)
CA (1) CA2067296C (fr)
DE (2) DE69227640T2 (fr)
ES (1) ES2091395T3 (fr)
FI (1) FI111964B (fr)
MX (1) MX9201966A (fr)
NO (1) NO180495C (fr)
NZ (1) NZ242465A (fr)
RU (1) RU2039141C1 (fr)
SE (1) SE470065C (fr)
ZA (1) ZA923073B (fr)

Families Citing this family (34)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FI89516B (fi) 1989-05-10 1993-06-30 Ahlstroem Oy Foerfarande foer blekning av cellulosamassa med otson
US6398908B1 (en) 1991-04-30 2002-06-04 Eka Nobel Ab Process for acid bleaching of lignocellulose-containing pulp with a magnesium compound
SE500353C2 (sv) * 1992-10-26 1994-06-06 Sca Wifsta Oestrand Ab Peroxidblekning av sulfatmassa med tillsats av magnesium före blekningen
SE512137C2 (sv) * 1992-10-29 2000-01-31 Eka Chemicals Ab Förfarande för blekning av lignocellulosahaltig massa
SE9203366L (sv) * 1992-11-11 1994-05-12 Mo Och Domsjoe Ab Förfarande vid delignifiering och/eller blekning av cellulosamassa
US6007678A (en) * 1992-11-27 1999-12-28 Eka Nobel Ab Process for delignification of lignocellulose-containing pulp with an organic peracid or salts thereof
EP0622491B2 (fr) * 1993-04-20 2002-07-17 Eka Chemicals AB Procédé pour le blanchiment de pâte à papier contenant de la lignocellulose
SE500616C2 (sv) * 1993-06-08 1994-07-25 Kvaerner Pulping Tech Blekning av kemisk massa med peroxid vid övertryck
US6605181B1 (en) * 1993-10-01 2003-08-12 Kvaerner Pulping Aktiebolag Peroxide bleach sequence including an acidic bleach stage and including a wash stage
BE1007757A3 (fr) * 1993-11-10 1995-10-17 Solvay Interox Procede pour le blanchiment d'une pate a papier chimique.
FI102301B1 (fi) * 1994-10-13 1998-11-13 Ahlstrom Machinery Oy Menetelmä selluloosamassojen käsittelemiseksi
US6776876B1 (en) 1994-10-13 2004-08-17 Andritz Oy Method of treating cellulosic pulp to remove hexenuronic acid
DE19516151A1 (de) 1995-05-03 1996-11-07 Sven Siegle Verfahren zur Herstellung einer Pulpe aus zellulosehaltigem Material, die Pulpe selbst und deren Verwendung
FI105701B (fi) 1995-10-20 2000-09-29 Ahlstrom Machinery Oy Menetelmä ja laitteisto massan käsittelemiseksi
JPH108092A (ja) * 1996-06-21 1998-01-13 Mitsubishi Paper Mills Ltd 過酸化物漂白用安定化剤及びそれを用いた繊維系物質の漂白方法
BE1010679A3 (fr) * 1996-10-11 1998-11-03 Solvay Interox Procede de delignification et de blanchiment de pate a papier chimique.
ID23571A (id) * 1997-08-25 2000-05-04 Praxair Technology Inc Metoda penerapan ozon dalam pemutihan ecf
JP2002266272A (ja) * 2001-03-12 2002-09-18 Nippon Paper Industries Co Ltd セルロース質繊維材料パルプの漂白方法
US6743332B2 (en) * 2001-05-16 2004-06-01 Weyerhaeuser Company High temperature peroxide bleaching of mechanical pulps
KR100547491B1 (ko) * 2005-04-27 2006-01-31 이권혁 대나무를 이용하여 생산하는 섬유용 펄프의 제조방법 및 그 펄프
US9511167B2 (en) 2009-05-28 2016-12-06 Gp Cellulose Gmbh Modified cellulose from chemical kraft fiber and methods of making and using the same
US8778136B2 (en) 2009-05-28 2014-07-15 Gp Cellulose Gmbh Modified cellulose from chemical kraft fiber and methods of making and using the same
US9512237B2 (en) 2009-05-28 2016-12-06 Gp Cellulose Gmbh Method for inhibiting the growth of microbes with a modified cellulose fiber
US9512563B2 (en) 2009-05-28 2016-12-06 Gp Cellulose Gmbh Surface treated modified cellulose from chemical kraft fiber and methods of making and using same
JP6254078B2 (ja) 2011-05-23 2017-12-27 ゲーペー ツェルローゼ ゲーエムベーハー 白色度および明度が改善された針葉樹クラフト繊維、ならびにそれを作製する方法および使用する方法
KR102093167B1 (ko) 2012-01-12 2020-03-26 게페 첼루로제 게엠베하 황변 성질이 감소된 저 점성 크래프트 섬유 및 그의 제조 및 사용 방법
RU2636306C2 (ru) 2012-04-18 2017-11-21 ДжиПи СЕЛЛЬЮЛОУС ГМБХ Использование поверхностно-активного вещества для обработки пульпы и улучшение введения крафт-пульпы в волокно для получения вискозы и других вторичных волокнистых продуктов
JP6129323B2 (ja) * 2012-09-27 2017-05-17 アンドリッツ インコーポレーテッド リグノセルロース系繊維束材料の化学的処理並びにそれに関する方法及びシステム
MX365675B (es) 2013-02-08 2019-06-10 Gp Cellulose Gmbh Fibra kraft de madera blanda que tiene un contenido mejorado de a-celulosa, y su uso en la produccion de productos de celulosa quimica.
WO2014140852A2 (fr) 2013-03-14 2014-09-18 Gp Cellulose Gmbh Procédé de fabrication d'une fibre kraft extrêmement fonctionnelle et de viscosité faible, en utilisant une séquence de blanchiment acide, et fibre fabriquée par ce procédé
BR112015020000A2 (pt) 2013-03-15 2017-07-18 Gp Cellulose Gmbh fibra kraft quimicamente modificada e métodos de fabricação da mesma
WO2017055504A1 (fr) * 2015-09-30 2017-04-06 Imerys Minerals Limited Procédés de blanchiment de pâtes aqueuses, et compositions destinées à être utilisées dans ces procédés
CA3040734A1 (fr) 2016-11-16 2018-05-24 Gp Cellulose Gmbh Cellulose modifiee a base de fibres chimiques et procedes de fabrication et d'utilisation de ladite cellulose modifiee
WO2021209586A1 (fr) * 2020-04-16 2021-10-21 Bim Kemi Ab Procédé de délignification

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA1206704A (fr) * 1982-01-28 1986-07-02 Dominique Lachenal Procede pour le traitement de pates papetieres chimiques

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3507744A (en) * 1966-04-01 1970-04-21 Kimberly Clark Co Wood pulp bleaching process utilizing peroxide pyrophosphate high concentration compositions
SE335053B (fr) * 1969-05-13 1971-05-10 Mo Och Domsjoe Ab
DE2742262C2 (de) * 1977-09-20 1982-06-09 Degussa Ag, 6000 Frankfurt Verfahren zur Herstellung eines mittel- bis hochviskosen Nadelholz-Sulfitzellstoffs
FR2557605B1 (fr) * 1983-12-29 1987-12-11 Atochem Procede de blanchiment de pates papetieres par le peroxyde d'hydrogene
JPH0364589A (ja) * 1989-07-28 1991-03-19 Mitsubishi Gas Chem Co Inc 化学パルプの漂白方法

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA1206704A (fr) * 1982-01-28 1986-07-02 Dominique Lachenal Procede pour le traitement de pates papetieres chimiques

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
J.P. CASEY: "Pulp and Paper; Chemistry and Chemical Technology, 3rd edition, vol. I, page 651", JOHN WILEY & SONS, NEW YORK *

Also Published As

Publication number Publication date
SE470065C (sv) 1995-10-12
EP0511695B2 (fr) 2004-06-02
FI921886A0 (fi) 1992-04-27
ATE173518T1 (de) 1998-12-15
RU2039141C1 (ru) 1995-07-09
ZA923073B (en) 1992-12-30
DE69227640T2 (de) 1999-05-06
ATE141971T1 (de) 1996-09-15
NO180495C (no) 2003-06-06
EP0511695A1 (fr) 1992-11-04
EP0511695B1 (fr) 1996-08-28
SE9101301L (sv) 1992-10-31
BR9201554A (pt) 1992-12-01
JP2592747B2 (ja) 1997-03-19
SE470065B (sv) 1993-11-01
FI921886A (fi) 1992-10-31
ES2091395T3 (es) 1996-11-01
SE9101301D0 (sv) 1991-04-30
DE69213080D1 (de) 1996-10-02
JPH05148784A (ja) 1993-06-15
MX9201966A (es) 1992-11-01
FI111964B (fi) 2003-10-15
NZ242465A (en) 1993-12-23
AU651192B2 (en) 1994-07-14
NO921671L (no) 1992-11-02
AU1514992A (en) 1993-03-11
CA2067296C (fr) 1997-03-04
NO180495B (no) 1997-01-20
CA2067296A1 (fr) 1992-10-31
EP0679760A1 (fr) 1995-11-02
DE69227640D1 (de) 1998-12-24
NO921671D0 (no) 1992-04-29

Similar Documents

Publication Publication Date Title
EP0679760B1 (fr) Procédé pour le blanchiment de pâte à papier contenant de la lignocellulose
US6398908B1 (en) Process for acid bleaching of lignocellulose-containing pulp with a magnesium compound
CA2067295C (fr) Procede de blanchiment de matiere contenant de la lignocellulose
US5310458A (en) Process for bleaching lignocellulose-containing pulps
JP2864167B2 (ja) リグノセルロース含有パルプの脱リグニン化法
US5143580A (en) Process for reducing the amount of halogenated organic compounds in spent liquor from a peroxide-halogen bleaching sequence
EP0622491B2 (fr) Procédé pour le blanchiment de pâte à papier contenant de la lignocellulose
CA1070909A (fr) Delignification au bioxyde d'azote et a l'oxygene
EP0595386B2 (fr) Procédé pour le blanchiment de pâte à papier chimiquement cuite contenant de la lignocellulose
CA2139246A1 (fr) Procede de blanchiment de pate renfermant de la lignocellulose

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 19941215

AC Divisional application: reference to earlier application

Ref document number: 511695

Country of ref document: EP

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT BE CH DE ES FR IT LI PT SE

RAP1 Party data changed (applicant data changed or rights of an application transferred)

Owner name: EKA CHEMICALS AB

GRAG Despatch of communication of intention to grant

Free format text: ORIGINAL CODE: EPIDOS AGRA

GRAG Despatch of communication of intention to grant

Free format text: ORIGINAL CODE: EPIDOS AGRA

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AC Divisional application: reference to earlier application

Ref document number: 511695

Country of ref document: EP

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AT BE CH DE ES FR IT LI PT SE

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LI

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 19981118

Ref country code: IT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRE;WARNING: LAPSES OF ITALIAN PATENTS WITH EFFECTIVE DATE BEFORE 2007 MAY HAVE OCCURRED AT ANY TIME BEFORE 2007. THE CORRECT EFFECTIVE DATE MAY BE DIFFERENT FROM THE ONE RECORDED.SCRIBED TIME-LIMIT

Effective date: 19981118

Ref country code: FR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 19981118

Ref country code: ES

Free format text: THE PATENT HAS BEEN ANNULLED BY A DECISION OF A NATIONAL AUTHORITY

Effective date: 19981118

Ref country code: CH

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 19981118

Ref country code: BE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 19981118

Ref country code: AT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 19981118

REF Corresponds to:

Ref document number: 173518

Country of ref document: AT

Date of ref document: 19981215

Kind code of ref document: T

REG Reference to a national code

Ref country code: CH

Ref legal event code: EP

REF Corresponds to:

Ref document number: 69227640

Country of ref document: DE

Date of ref document: 19981224

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: PT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 19990218

EN Fr: translation not filed
REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: SE

Payment date: 20020405

Year of fee payment: 11

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20020417

Year of fee payment: 11

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SE

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

Effective date: 20030409

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

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

Effective date: 20031101

EUG Se: european patent has lapsed