Global Patent Index - EP 1049818 A1

EP 1049818 A1 2000-11-08 - NON-CARBON METAL-BASED ANODES FOR ALUMINIUM PRODUCTION CELLS

Title (en)

NON-CARBON METAL-BASED ANODES FOR ALUMINIUM PRODUCTION CELLS

Title (de)

KOHLENSTOFF-FREIE ANODEN AUF BASIS VON METALLEN FÜR ALUMINIUM-ELEKTROGEWINNUNGSZELLEN

Title (fr)

ANODES METALLIQUES EXEMPTES DE CARBONE POUR CELLULES DE PRODUCTION D'ALUMINIUM

Publication

EP 1049818 A1 (EN)

Application

EP 99900110 A

Priority

  • IB 9900084 W
  • IB 9800080 W
  • US 12620698 A
  • US 12684098 A
  • US 12635998 A

Abstract (en)

[origin: WO9936594A1] A non-carbon metal-based anode of a cell for the electrowinning of aluminium comprising an electrically conductive metal substrate resistant to high temperature, the surface of which becomes passive and substantially inert to the electrolyte, and a coating adherent to the metal substrate making the surface of the anode electrochemically active for the oxidation of oxygen ions present at the electrolyte interface. The substrate metal may be selected from nickel, cobalt, chromium, molybdenum, tantalum and the Lanthanide series. The active constituents of the coating are for example oxides such as spinels or perovskites, oxyfluorides, phosphides or carbides, in particular ferrites. The active constituents may be coated onto the substrate from a slurry or suspension containing colloidal material and the electrochemically active material.

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

C25C 3/12; C25C 7/02

IPC 8 full level (invention and additional information)

C25C 3/12 (2006.01); C25C 7/02 (2006.01)

CPC (invention and additional information)

C25C 3/12 (2013.01); C25C 7/025 (2013.01)

Citation (search report)

See references of WO 9936594A1

Designated contracting state (EPC)

DE ES FR GB IT NL

EPO simple patent family

WO 9936594 A1 19990722; AU 1779899 A 19990802; AU 740270 B2 20011101; CA 2317800 A1 19990722; CA 2317800 C 20080401; DE 69922924 D1 20050203; DE 69922924 T2 20051215; EP 1049818 A1 20001108; EP 1049818 B1 20041229; ES 2230828 T3 20050501; NO 20003701 A 20000719; NO 20003701 D0 20000719

INPADOC legal status


2010-04-30 [PG25 ES] LAPSED IN A CONTRACTING STATE ANNOUNCED VIA POSTGRANT INFORM. FROM NAT. OFFICE TO EPO

- Ref Country Code: ES

- Free text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

- Effective date: 20090120

2010-03-29 [REG ES FD2A] ANNOUNCEMENT OF LAPSE IN SPAIN

- Effective date: 20090120

2009-11-30 [PG25 GB] LAPSED IN A CONTRACTING STATE ANNOUNCED VIA POSTGRANT INFORM. FROM NAT. OFFICE TO EPO

- Ref Country Code: GB

- Free text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

- Effective date: 20090119

2009-11-30 [PG25 NL] LAPSED IN A CONTRACTING STATE ANNOUNCED VIA POSTGRANT INFORM. FROM NAT. OFFICE TO EPO

- Ref Country Code: NL

- Free text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

- Effective date: 20090801

2009-10-30 [PG25 DE] LAPSED IN A CONTRACTING STATE ANNOUNCED VIA POSTGRANT INFORM. FROM NAT. OFFICE TO EPO

- Ref Country Code: DE

- Free text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

- Effective date: 20090801

2009-10-01 [NLV4] NL: LAPSED OR ANULLED DUE TO NON-PAYMENT OF THE ANNUAL FEE

- Effective date: 20090801

2009-09-30 [PG25 IT] LAPSED IN A CONTRACTING STATE ANNOUNCED VIA POSTGRANT INFORM. FROM NAT. OFFICE TO EPO

- Ref Country Code: IT

- Free text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

- Effective date: 20070119

2009-09-23 [GBPC] GB: EUROPEAN PATENT CEASED THROUGH NON-PAYMENT OF RENEWAL FEE

- Effective date: 20090119

2009-04-30 [PG25 FR] LAPSED IN A CONTRACTING STATE ANNOUNCED VIA POSTGRANT INFORM. FROM NAT. OFFICE TO EPO

- Ref Country Code: FR

- Free text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

- Effective date: 20080131

2008-12-05 [REG FR ST] NOTIFICATION OF LAPSE

- Effective date: 20081029

2008-05-30 [PGFP DE] POSTGRANT: ANNUAL FEES PAID TO NATIONAL OFFICE

- Ref Country Code: DE

- Payment date: 20080115

- Year of fee payment: 10

2008-05-30 [PGFP NL] POSTGRANT: ANNUAL FEES PAID TO NATIONAL OFFICE

- Ref Country Code: NL

- Payment date: 20071226

- Year of fee payment: 10

2008-04-30 [PGFP ES] POSTGRANT: ANNUAL FEES PAID TO NATIONAL OFFICE

- Ref Country Code: ES

- Payment date: 20080111

- Year of fee payment: 10

2008-04-30 [PGFP FR] POSTGRANT: ANNUAL FEES PAID TO NATIONAL OFFICE

- Ref Country Code: FR

- Payment date: 20070129

- Year of fee payment: 9

2008-04-30 [PGFP GB] POSTGRANT: ANNUAL FEES PAID TO NATIONAL OFFICE

- Ref Country Code: GB

- Payment date: 20071227

- Year of fee payment: 10

2006-01-31 [PGFP IT] POSTGRANT: ANNUAL FEES PAID TO NATIONAL OFFICE

- Ref Country Code: IT

- Payment date: 20060131

- Year of fee payment: 8

2005-12-21 [26N] NO OPPOSITION FILED

- Effective date: 20050930

2005-09-30 [ET] FR: TRANSLATION FILED

2005-05-01 [REG ES FG2A] DEFINITIVE PROTECTION

- Document: ES 2230828 T3

2005-02-03 [REF] CORRESPONDS TO:

- Document: DE 69922924 P 20050203

2004-12-29 [AK] DESIGNATED CONTRACTING STATES:

- Kind Code of Ref Document: B1

- Designated State(s): DE ES FR GB IT NL

2004-12-29 [REG GB FG4D] EUROPEAN PATENT GRANTED

2003-07-16 [RAP1] TRANSFER OF RIGHTS OF AN EP PUBLISHED APPLICATION

- Owner name: MOLTECH INVENT S.A.

2000-11-08 [17P] REQUEST FOR EXAMINATION FILED

- Effective date: 20000725

2000-11-08 [AK] DESIGNATED CONTRACTING STATES:

- Kind Code of Ref Document: A1

- Designated State(s): DE ES FR GB IT NL