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(12) Patent: | (11) CA 2018491 |
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(54) English Title: | PROCEDE ET DISPOSITIF DE DEGAZAGE ET DE MAINTIEN D'UNE FAIBLE TENEUR EN HYDROGENE DANS LES ALLIAGES D'ALUMINIUM LIQUIDES AU COURS DE LEUR TRANSPORT DANS DES POCHES |
(54) French Title: | PROCESS AND APPARATUS FOR DEGASSING AND MAINTAINING A LOW HYDROGEN CONTENT IN LIQUID ALUMINIUM ALLOYS DURING TRANSPORTATION IN LADLES |
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: | ROBIC AGENCE PI S.E.C./ROBIC IP AGENCY LP |
(74) Associate agent: | |
(45) Issued: | 1998-11-17 |
(22) Filed Date: | 1990-06-07 |
(41) Open to Public Inspection: | 1990-12-13 |
Examination requested: | 1990-06-07 |
Availability of licence: | N/A |
Dedicated to the Public: | N/A |
(25) Language of filing: | French |
Patent Cooperation Treaty (PCT): | No |
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(30) Application Priority Data: | ||||||
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A procedure and device for degassing and maintaining a low level of hydrogen in liquid aluminum alloys when they are transported in containers. The procedure involves circulating in the container a stream of gases that are inert relative to aluminum, at a slow, controlled rate and then evacuating the said gas(es) from the container. The device consists of at least one container and at least one cylinder containing a gas under pressure; the container and bottle are connected by a circuit consisting of a regulator, a flowmeter and a gas injection system. The upper part of the container is equipped with a system for the controlled release of the gas. This invention reduces and prevents gassing of the metal during transport and gives users an aluminum alloy that is ready for casting and metallurgically sound.
Procédé et à dispositif de dégazage et de maintien d'une
faible teneur en hydrogène dans les alliages d'aluminium
liquides au cours de leur transport dans les poches. Le
procédé est caractérisé en ce que l'on fait circuler dans
la poche un flux de gaz inertes vis à vis de l'aluminium
suivant un débit faible et contrôlé, puis on évacue le(s)
dit(s) gaz hors de la poche. Le dispositif est constitué
d'au moins une poche et d'au moins une bouteille contenant
un gaz sous pression reliées entre elles par un circuit
comportant un détendeur, un débitmètre, un système d'injection
du gaz, ladite poche étant équipée à sa partie
supérieure d'un système de fuite contrôlée du gaz. Cette
invention permet de réduire et d'éviter le gazage du métal au
cours du transport et de fournir aux utilisateurs un alliage
d'aluminium apte au moulage de pièces ayant une bonne
santé métallurgique.
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.
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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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Inactive: IPC from MCD | 2006-03-11 |
Time Limit for Reversal Expired | 2004-06-07 |
Letter Sent | 2003-06-09 |
Grant by Issuance | 1998-11-17 |
Inactive: Delete abandonment | 1998-09-09 |
Deemed Abandoned - Conditions for Grant Determined Not Compliant | 1998-06-16 |
Pre-grant | 1998-05-29 |
Inactive: Final fee received | 1998-05-29 |
Notice of Allowance is Issued | 1997-12-16 |
Notice of Allowance is Issued | 1997-12-16 |
4 | 1997-12-16 |
Letter Sent | 1997-12-16 |
Inactive: Status info is complete as of Log entry date | 1997-12-12 |
Inactive: Application prosecuted on TS as of Log entry date | 1997-12-12 |
Inactive: Approved for allowance (AFA) | 1997-08-21 |
Inactive: IPC removed | 1997-08-21 |
Inactive: First IPC assigned | 1997-08-21 |
Inactive: IPC assigned | 1997-08-21 |
Application Published (Open to Public Inspection) | 1990-12-13 |
All Requirements for Examination Determined Compliant | 1990-06-07 |
Request for Examination Requirements Determined Compliant | 1990-06-07 |
Abandonment Date | Reason | Reinstatement Date |
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1998-06-16 |
The last payment was received on 1998-05-28
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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MF (application, 7th anniv.) - standard | 07 | 1997-06-09 | 1997-05-26 |
MF (application, 8th anniv.) - standard | 08 | 1998-06-08 | 1998-05-28 |
Final fee - standard | 1998-05-29 | ||
MF (patent, 9th anniv.) - standard | 1999-06-07 | 1999-05-31 | |
MF (patent, 10th anniv.) - standard | 2000-06-07 | 2000-05-30 | |
MF (patent, 11th anniv.) - standard | 2001-06-07 | 2001-05-28 | |
MF (patent, 12th anniv.) - standard | 2002-06-07 | 2002-05-27 |
Note: Records showing the ownership history in alphabetical order.
Current Owners on Record |
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ALUMINIUM PECHINEY |
Past Owners on Record |
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ALAIN MARGUIER |
GERARD LASLAZ |
PIERRE LATY |