Process and apparatus for degassing and maintaining a low hydrogen content in liquid aluminium alloys during transportation in ladles
CA 2018491 C · Owner: Laslaz, Gerard · Inventors: Laslaz, Gerard; Laty, Pierre; Marguier, Alain
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
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 …
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Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Filed June 7, 1990 and granted November 17, 1998. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended June 7, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 7, 2012.
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Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.