Global patent index - EP 1019443 A1

EP 1019443 A1 2000-07-19 - REACTIVE CELLULOSE AND METHOD FOR MAKING SAME

Title (en)

REACTIVE CELLULOSE AND METHOD FOR MAKING SAME

Title (de)

REAKTIVE ZELLULOSE UND VERFAHREN ZUR HERSTELLUNG DIESER ZELLULOSE

Title (fr)

CELLULOSE REACTIVE ET PROCEDE DE FABRICATION DE CETTE CELLULOSE

Publication

EP 1019443 A1 (FR)

Application

EP 98920508 A

Priority

  • EP 9802092 W
  • FR 9705430 A

Abstract (en)

[origin: FR2762603A1] The invention concerns reactive cellulose, i.e. having in particular a very low degree of crystallinity obtainable with a high degree of purity. Said novel reactive cellulose is particularly used as raw material for making cellulose ethers. The invention is characterised in that the reactive cellulose is substituted by organic groups according to a degree of substitution DS less than 0.2, advantageously ranging between 0.04 and 0.2.

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

C08B 1/00; C08B 1/02; C08B 1/06

IPC 8 full level (invention and additional information)

C08B 1/00 (2006.01); C08B 1/02 (2006.01); C08B 1/06 (2006.01); C08B 3/00 (2006.01); C08B 11/00 (2006.01); C08B 11/04 (2006.01); C08B 11/16 (2006.01)

CPC (invention and additional information)

C08B 3/00 (2013.01); C08B 11/00 (2013.01)

Citation (search report)

See references of WO 9849200A1

Designated contracting state (EPC)

AT BE DE FI FR GB IT NL PT

EPO simple patent family

FR 2762603 A1 19981030; FR 2762603 B1 19990716; AU 7334598 A 19981124; CA 2286572 A1 19981105; EP 1019443 A1 20000719; JP 2000513042 A 20001003; JP 3251021 B2 20020128; RU 2202558 C2 20030420; US 6392035 B1 20020521; WO 9849200 A1 19981105

INPADOC legal status

2003-04-23 [18W] WITHDRAWN

- Ref Legal Event Code: 18W

- Effective date: 20030110

2000-11-15 [17Q] FIRST EXAMINATION REPORT

- Ref Legal Event Code: 17Q

- Effective date: 20001004

2000-07-19 [17P] REQUEST FOR EXAMINATION FILED

- Ref Legal Event Code: 17P

- Effective date: 19991018

2000-07-19 [AK] DESIGNATED CONTRACTING STATES:

- Ref Legal Event Code: AK

- Designated State(s): AT BE DE FI FR GB IT NL PT