Global Patent Index - EP 1242672 A2

EP 1242672 A2 2002-09-25 - METHOD FOR ELECTROCHEMICALLY REDUCING REDUCIBLE DYES

Title (en)

METHOD FOR ELECTROCHEMICALLY REDUCING REDUCIBLE DYES

Title (de)

VERFAHREN ZUR ELEKTROCHEMISCHEN REDUKTION VON REDUZIERBAREN FARBSTOFFEN

Title (fr)

PROCEDE DE REDUCTION ELECTROCHIMIQUE DE COLORANTS REDUCTIBLES

Publication

EP 1242672 A2 (DE)

Application

EP 00991621 A

Priority

  • DE 19962155 A
  • EP 0013103 W

Abstract (en)

[origin: WO0146497A2] The invention relates to a method for electrochemically reducing reducible dyes by bringing said reducible dye into contact with a cathode. Said cathode comprises a support consisting of an electrically conductive material and an electrically conductive, cathodically polarised layer which has been formed in situ by deposition. The method is characterised in that the electrochemical reduction is carried out in the presence of a base.

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

D06P 1/22; D06P 1/30

IPC 8 full level (invention and additional information)

C09B 67/28 (2006.01); C25B 3/04 (2006.01); C25B 11/04 (2006.01); D06P 1/22 (2006.01); D06P 1/28 (2006.01); D06P 1/30 (2006.01); D06P 3/60 (2006.01); D06P 5/20 (2006.01); C02F 1/461 (2006.01); C02F 1/467 (2006.01)

CPC (invention and additional information)

D06P 5/2016 (2013.01); C25B 3/04 (2013.01); D06P 1/221 (2013.01); D06P 1/30 (2013.01); C02F 1/4676 (2013.01); C02F 2001/46119 (2013.01); C02F 2001/46142 (2013.01); C02F 2001/46161 (2013.01); C02F 2101/308 (2013.01)

Citation (search report)

See references of WO 0146497A3

Designated contracting state (EPC)

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

EPO simple patent family

WO 0146497 A2 20010628; WO 0146497 A3 20011213; AU 3365201 A 20010703; BR 0016520 A 20020924; CN 1408037 A 20030402; DE 19962155 A1 20010628; EP 1242672 A2 20020925; JP 2003518198 A 20030603; MX PA02006334 A 20021213; US 2003098246 A1 20030529; US 2004069653 A1 20040415

INPADOC legal status


2004-03-17 [18D] APPLICATION DEEMED TO BE WITHDRAWN

- Effective date: 20030829

2003-04-16 [17Q] FIRST EXAMINATION REPORT

- Effective date: 20030228

2002-10-02 [RAP1] TRANSFER OF RIGHTS OF AN APPLICATION

- Owner name: DYSTAR TEXTILFARBEN GMBH & CO. DEUTSCHLAND KG

2002-09-25 [17P] REQUEST FOR EXAMINATION FILED

- Effective date: 20020722

2002-09-25 [AK] DESIGNATED CONTRACTING STATES:

- Kind Code of Ref Document: A2

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

2002-09-25 [AX] REQUEST FOR EXTENSION OF THE EUROPEAN PATENT TO:

- Free text: AL;LT;LV;MK;RO;SI