Global Patent Index - EP 1023493 A1

EP 1023493 A1 2000-08-02 - CELLULOSE FILTER PAPER SATURANT

Title (en)

CELLULOSE FILTER PAPER SATURANT

Title (de)

TRÄNKMITTEL FÜR ZELLSTOFFFILTERPAPIER

Title (fr)

AGENT D'IMPREGNATION DE PAPIER FILTRE EN CELLULOSE

Publication

EP 1023493 A1 (EN)

Application

EP 98944792 A

Priority

  • US 9818624 W
  • US 5967597 P

Abstract (en)

[origin: WO9914431A1] An aqueous saturant for cellulose papers comprising a hydrolyzed polyvinyl alcohol and a formaldehyde resin, wherein the polyvinyl alcohol and the formaldehyde resin are substantially or completely dissolved in the system. The invention is also directed to methods for making and using the saturant. The system is also directed to paper, e.g., filter paper, made with the saturant as well as methods for making paper with the saturant.

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

D21H 17/33

IPC 8 full level (invention and additional information)

B01D 39/18 (2006.01); D21H 19/20 (2006.01); D21H 19/24 (2006.01); D21H 27/08 (2006.01); D21H 17/36 (2006.01); D21H 17/47 (2006.01)

CPC (invention and additional information)

B01D 39/18 (2013.01); D21H 27/08 (2013.01); D21H 17/36 (2013.01); D21H 17/47 (2013.01)

Designated contracting state (EPC)

AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

EPO simple patent family

WO 9914431 A1 19990325; AU 9224598 A 19990405; EP 1023493 A1 20000802; EP 1023493 A4 20011024; JP 2001516824 A 20011002

INPADOC legal status


2002-11-06 [18D] DEEMED TO BE WITHDRAWN

- Effective date: 20020403

2001-10-24 [A4] SUPPLEMENTARY SEARCH REPORT

- Effective date: 20010912

2001-10-24 [AK] DESIGNATED CONTRACTING STATES:

- Kind Code of Ref Document: A4

- Designated State(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

2001-10-24 [RIC1] CLASSIFICATION (CORRECTION)

- Free text: 7D 21H 17/33 A, 7B 01D 39/18 B

2000-08-02 [17P] REQUEST FOR EXAMINATION FILED

- Effective date: 20000418

2000-08-02 [AK] DESIGNATED CONTRACTING STATES:

- Kind Code of Ref Document: A1

- Designated State(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE