Global Patent Index - EP 1049815 A1

EP 1049815 A1 2000-11-08 - SURFACE COATED NON-CARBON METAL-BASED ANODES FOR ALUMINIUM PRODUCTION CELLS

Title (en)

SURFACE COATED NON-CARBON METAL-BASED ANODES FOR ALUMINIUM PRODUCTION CELLS

Title (de)

BESCHICHTETE KOHLENSTOFF-FREIE ANODEN AUF BASIS VON METALLEN ZUR ANWENDUNG IN ALUMINIUM-HERSTELLUNGSZELLEN

Title (fr)

ANODES METALLIQUES EXEMPTES DE CARBONE A REVETEMENT DE SURFACE POUR DES CELLULES ELECTROLYTIQUES DE PRODUCTION D'ALUMINIUM

Publication

EP 1049815 A1 (EN)

Application

EP 99900107 A

Priority

  • IB 9900079 W
  • IB 9800081 W
  • US 12620698 A
  • US 12635998 A

Abstract (en)

[origin: WO9936591A1] A non-carbon, metal-based, high temperature resistant, electrically conductive and electrochemically active anode of a cell for the production of aluminium has a metal-based oxidation-resistant substrate to which an adherent multi-layer coating is applied prior to its immersion into the electrolyte and start up of the electrolysis by connection to the positive current supply. The multi-layer coating is obtainable from one or more applied layers selected from: a liquid solution, a dispersion in a liquid or a paste, a suspension in a liquid or a paste, and a pasty or non-pasty slurry, and combinations thereof, with or without heat treatment between two consecutively applied layers. At least one layer of the multi-layer coating contains a polymeric and/or a colloidal carrier. The coating is after final heat treatment electrically conductive and has during operation in the cell an electrochemically active surface for the oxidation of oxygen ions present at the surface of the anode.

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)

CPC (invention and additional information)

C25C 3/12 (2013.01)

Citation (search report)

See references of WO 9936591A1

Designated contracting state (EPC)

DE ES FR GB IT NL

EPO simple patent family

WO 9936591 A1 19990722; AU 1779599 A 19990802; AU 747906 B2 20020530; CA 2317595 A1 19990722; DE 69906697 D1 20030515; DE 69906697 T2 20040311; EP 1049815 A1 20001108; EP 1049815 B1 20030409; NO 20003704 A 20000719; NO 20003704 D0 20000719

INPADOC legal status


2006-12-08 [REG FR ST] NOTIFICATION OF LAPSE

- Effective date: 20060929

2006-09-27 [GBPC] GB: EUROPEAN PATENT CEASED THROUGH NON-PAYMENT OF RENEWAL FEE

- Effective date: 20060119

2006-08-01 [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: 20060801

2006-01-31 [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: 20060131

2006-01-19 [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: 20060119

2005-01-26 [PGFP FR] POSTGRANT: ANNUAL FEES PAID TO NATIONAL OFFICE

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2004-12-27 [PGFP DE] POSTGRANT: ANNUAL FEES PAID TO NATIONAL OFFICE

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2004-12-24 [PGFP GB] POSTGRANT: ANNUAL FEES PAID TO NATIONAL OFFICE

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- Payment date: 20041224

- Year of fee payment: 7

2004-03-31 [26N] NO OPPOSITION FILED

- Effective date: 20040112

2003-10-30 [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 FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

- Effective date: 20031030

2003-09-19 [ET] FR: TRANSLATION FILED

2003-09-01 [NLT2] NL: MODIFICATIONS (OF NAMES), TAKEN FROM THE EUROPEAN PATENT PATENT BULLETIN

- Owner name: MOLTECH INVENT S.A.

2003-09-01 [NLV1] NL: LAPSED OR ANNULLED DUE TO FAILURE TO FULFILL THE REQUIREMENTS OF ART. 29P AND 29M OF THE PATENTS ACT

2003-07-16 [RAP2] TRANSFER OF RIGHTS OF AN EP GRANTED PATENT

- Owner name: MOLTECH INVENT S.A.

2003-04-09 [AK] DESIGNATED CONTRACTING STATES:

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

2003-04-09 [REG GB FG4D] EUROPEAN PATENT GRANTED

2003-04-09 [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 FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

- Effective date: 20030409

2003-04-09 [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 FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

- Effective date: 20030409

2002-09-11 [RTI1] TITLE (CORRECTION)

- Free text: METHOD FOR PRODUCING SURFACE COATED NON-CARBON METAL-BASED ANODES FOR ALUMINIUM PRODUCTION CELLS

2001-07-11 [17Q] FIRST EXAMINATION REPORT

- Effective date: 20010523

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

- Effective date: 20000808

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

- Kind Code of Ref Document: A1

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