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(12) Patent: | (11) CA 2317800 |
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(54) English Title: | NON-CARBON METAL-BASED ANODES FOR ALUMINIUM PRODUCTION CELLS |
(54) French Title: | ANODES METALLIQUES EXEMPTES DE CARBONE POUR CELLULES DE PRODUCTION D'ALUMINIUM |
Status: | Expired and beyond the Period of Reversal |
(51) International Patent Classification (IPC): |
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(72) Inventors : |
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(73) Owners : |
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(71) Applicants : |
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(74) Agent: | GOWLING WLG (CANADA) LLP |
(74) Associate agent: | |
(45) Issued: | 2008-04-01 |
(86) PCT Filing Date: | 1999-01-19 |
(87) Open to Public Inspection: | 1999-07-22 |
Examination requested: | 2004-01-15 |
Availability of licence: | N/A |
Dedicated to the Public: | N/A |
(25) Language of filing: | English |
Patent Cooperation Treaty (PCT): | Yes |
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(86) PCT Filing Number: | PCT/IB1999/000084 |
(87) International Publication Number: | IB1999000084 |
(85) National Entry: | 2000-07-05 |
(30) Application Priority Data: | |||||||||||||||
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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.
Anode métallique exempte de carbone pour une cellule d'extraction électrolytique d'aluminium, qui comporte un substrat métallique électriquement conducteur résistant aux hautes températures, dont la surface devient passive et pratiquement inerte à l'électrolyte, et un revêtement qui adhère au substrat métallique et qui rend la surface de l'anode électrochimiquement active pour l'oxydation des ions d'oxygène présents au niveau de l'interface de l'électrolyte. Le substrat métallique peut être choisi parmi nickel, cobalt, chrome, molybdène, tantale et la série des lanthanides. Les constituants actifs du revêtement sont par exemple des oxydes tels que des spinelles ou pérovskites, des oxyfluorures, des phosphures ou carbures, en particulier des ferrites. Les constituants actifs peuvent être déposés sur le substrat à partir d'un coulis ou d'une suspension contenant de la matière colloïdale et la matière électrochimiquement active.
Note: Claims are shown in the official language in which they were submitted.
Note: Descriptions are shown in the official language in which they were submitted.
Sorry, the representative drawing for patent document number 2317800 was not found.
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Please note that "Inactive:" events refers to events no longer in use in our new back-office solution.
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Description | Date |
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Time Limit for Reversal Expired | 2010-01-19 |
Letter Sent | 2009-01-19 |
Grant by Issuance | 2008-04-01 |
Inactive: Cover page published | 2008-03-31 |
Inactive: Final fee received | 2007-11-27 |
Pre-grant | 2007-11-27 |
Notice of Allowance is Issued | 2007-06-08 |
Letter Sent | 2007-06-08 |
Notice of Allowance is Issued | 2007-06-08 |
Inactive: Approved for allowance (AFA) | 2007-05-09 |
Amendment Received - Voluntary Amendment | 2007-01-29 |
Inactive: S.30(2) Rules - Examiner requisition | 2006-07-27 |
Amendment Received - Voluntary Amendment | 2004-09-23 |
Letter Sent | 2004-02-17 |
Request for Examination Requirements Determined Compliant | 2004-01-15 |
All Requirements for Examination Determined Compliant | 2004-01-15 |
Request for Examination Received | 2004-01-15 |
Letter Sent | 2001-08-21 |
Inactive: Correspondence - Transfer | 2001-07-20 |
Inactive: Single transfer | 2001-07-05 |
Inactive: Cover page published | 2000-10-17 |
Inactive: First IPC assigned | 2000-10-12 |
Inactive: Courtesy letter - Evidence | 2000-10-03 |
Inactive: Notice - National entry - No RFE | 2000-09-28 |
Inactive: Inventor deleted | 2000-09-27 |
Inactive: Inventor deleted | 2000-09-27 |
Application Received - PCT | 2000-09-26 |
Application Published (Open to Public Inspection) | 1999-07-22 |
There is no abandonment history.
The last payment was received on 2007-12-27
Note : If the full payment has not been received on or before the date indicated, a further fee may be required which may be one of the following
Patent fees are adjusted on the 1st of January every year. The amounts above are the current amounts if received by December 31 of the current year.
Please refer to the CIPO
Patent Fees
web page to see all current fee amounts.
Fee Type | Anniversary Year | Due Date | Paid Date |
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Basic national fee - standard | 2000-07-05 | ||
Registration of a document | 2000-07-05 | ||
MF (application, 2nd anniv.) - standard | 02 | 2001-01-19 | 2000-12-28 |
MF (application, 3rd anniv.) - standard | 03 | 2002-01-21 | 2001-12-24 |
MF (application, 4th anniv.) - standard | 04 | 2003-01-20 | 2002-12-24 |
MF (application, 5th anniv.) - standard | 05 | 2004-01-19 | 2003-12-23 |
Request for examination - standard | 2004-01-15 | ||
MF (application, 6th anniv.) - standard | 06 | 2005-01-19 | 2004-12-20 |
MF (application, 7th anniv.) - standard | 07 | 2006-01-19 | 2005-12-21 |
MF (application, 8th anniv.) - standard | 08 | 2007-01-19 | 2006-12-21 |
Final fee - standard | 2007-11-27 | ||
MF (application, 9th anniv.) - standard | 09 | 2008-01-21 | 2007-12-27 |
Note: Records showing the ownership history in alphabetical order.
Current Owners on Record |
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MOLTECH INVENT S.A. |
Past Owners on Record |
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JEAN-JACQUES DURUZ |
VITTORIO DE NORA |