Improving fillet forming of brazeable aluminum articles
CA 2250735 C · Owner: Kaiser Aluminum & Chemical Corporation · Inventors: Childree, David L.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A process for improving the fillet-forming capability of brazeable aluminum articles. It includes providing a brazeable aluminum article having at least , one surface; and contacting the surface with a dilute aqueous solution of , fluoridic compounds for at least 5 seconds at a temperature ranging from about 150 to 212 ~F to produce an oxide-free surface which can be readily brazed with a minimal drip loss.
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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 March 27, 1997 and granted May 7, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 27, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 27, 2019.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
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Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.