Global patent index - EP 1000339 A1

EP 1000339 A1 2000-05-17 - METHOD FOR TESTING THE QUALITY OF MEMBRANES

Title (en)

METHOD FOR TESTING THE QUALITY OF MEMBRANES

Title (de)

VERFAHREN ZUR QUALITÄTSÜBERPRÜFUNG VON MEMBRANEN

Title (fr)

PROCEDE DE CONTROLE QUALITE DE MEMBRANES

Publication

EP 1000339 A1 (DE)

Application

EP 98938695 A

Priority

  • DE 19732775 A
  • EP 9804565 W

Abstract (en)

[origin: DE19732775A1] The invention relates to a method for testing the quality of membranes. According to the invention, an aqueous test solution containing polyacrylic acid (s) and/or salts thereof and/or derivatives thereof is filtered through the membrane before and after said membrane has been treated with the solution to be filtered and the water rate and retention rate are determined.

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

G01N 15/08

IPC 8 full level (invention and additional information)

B01D 65/10 (2006.01); G01N 15/08 (2006.01)

CPC (invention and additional information)

B01D 65/10 (2013.01); G01N 15/0826 (2013.01); G01N 2015/086 (2013.01)

Citation (search report)

See references of WO 9906817A1

Designated contracting state (EPC)

DK NL

EPO simple patent family

DE 19732775 A1 19990204; AU 8732298 A 19990222; EP 1000339 A1 20000517; WO 9906817 A1 19990211

INPADOC legal status

2003-08-27 [18D] DEEMED TO BE WITHDRAWN

- Ref Legal Event Code: 18D

- Effective date: 20030201

2002-06-05 [RAP1] TRANSFER OF RIGHTS OF AN EP PUBLISHED APPLICATION

- Owner name: ECOLAB GMBH & CO. OHG

- Ref Legal Event Code: RAP1

2000-05-17 [17P] REQUEST FOR EXAMINATION FILED

- Ref Legal Event Code: 17P

- Effective date: 20000121

2000-05-17 [AK] DESIGNATED CONTRACTING STATES:

- Ref Legal Event Code: AK

- Designated State(s): DK NL