Global Patent Index - EP 1092064 A1

EP 1092064 A1 2001-04-18 - METHOD FOR MAKING PAPER AND CARDBOARD AND RETENTION AND DEWATERING AGENTS

Title (en)

METHOD FOR MAKING PAPER AND CARDBOARD AND RETENTION AND DEWATERING AGENTS

Title (de)

VERFAHREN ZUR HERSTELLUNG VON PAPIER UND PAPPE, UND RETENTIONS- UND ENTWÄSSERUNGSHILFSMITTEL

Title (fr)

PROCEDE DE FABRICATION DE PAPIER ET CARTON ET AGENTS DE RETENTION ET D'EGOUTTAGE

Publication

EP 1092064 A1 (FR)

Application

EP 99923647 A

Priority

  • FR 9901278 W
  • FR 9807144 A

Abstract (en)

[origin: FR2779452A1] The invention concerns an improved method for making paper which consists in using as main retention agent a branched polymer prepared in invert emulsion and bentonite as secondary retention agent (dual type system). The two additions are separated by a step for shearing the fibrous suspension (or mass). The invention enables to obtain a highly improved retention and also highly improved dewatering. Moreover, it enables to reduce the bentonite content in the white water.

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

D21H 23/76; D21H 21/10; D21H 23/14

IPC 8 full level (invention and additional information)

D21H 21/10 (2006.01); D21H 23/14 (2006.01); D21H 23/76 (2006.01); D21H 17/37 (2006.01); D21H 17/68 (2006.01)

CPC (invention and additional information)

D21H 23/14 (2013.01); D21H 21/10 (2013.01); D21H 23/765 (2013.01); D21H 17/37 (2013.01); D21H 17/68 (2013.01)

Citation (search report)

See references of WO 9963159A1

Designated contracting state (EPC)

AT DE FI FR GB IT SE

EPO simple patent family

FR 2779452 A1 19991210; FR 2779452 B1 20000811; AT 254693 T 20031215; AU 4043999 A 19991220; CA 2334196 A1 19991209; CA 2334196 C 20080715; DE 69912954 D1 20031224; DE 69912954 T2 20041111; DE 69912954 T3 20100128; EP 1092064 A1 20010418; EP 1092064 B1 20031119; EP 1092064 B2 20090422; EP 1092064 B9 20091021; JP 2002517626 A 20020618; JP 4699608 B2 20110615; WO 9963159 A1 19991209

INPADOC legal status


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2011-04-21 [REG DE R081] CHANGE OF APPLICANT/PATENTEE

- Owner name: S.P.C.M. S.A., FR

- Free text: FORMER OWNER: SNF, S.A., SAINT-ETIENNE, FR

- Document: DE 69912954

- Effective date: 20110214

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2009-10-13 [REG SE RPOT] EP PATENT HAS BEEN REPUBLISHED WITH A CORRECTED SWEDISH TRANSLATION

2009-08-18 [REG SE RPEO] EP PATENT HAS BEEN REPUBLISHED IN MODIFIED FORM AFTER OPPOSITION AT EPO

2009-04-22 [27A] MAINTAINED AS AMENDED

- Effective date: 20090422

2009-04-22 [AK] DESIGNATED CONTRACTING STATES:

- Kind Code of Ref Document: B2

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

2008-06-25 [RTI2] TITLE (CORRECTION)

- Free text: METHOD FOR MAKING PAPER AND CARDBOARD

2005-02-04 [REG FR TP] TRANSMISSION OF PROPERTY

2004-10-06 [26] OPPOSITION FILED

- Opponent name: CIBA SPECIALTY CHEMICALS WATER TREATMENTS LIMITED

- Effective date: 20040817

2004-03-24 [GBT] GB: TRANSLATION OF EP PATENT FILED (GB SECTION 77(6)(A)/1977)

- Effective date: 20040302

2004-03-09 [REG SE TRGR] TRANSLATION OF GRANTED EP PATENT

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- Document: DE 69912954 P 20031224

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2002-07-10 [17Q] FIRST EXAMINATION REPORT

- Effective date: 20020122

2001-04-18 [17P] REQUEST FOR EXAMINATION FILED

- Effective date: 20010104

2001-04-18 [AK] DESIGNATED CONTRACTING STATES:

- Kind Code of Ref Document: A1

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