Products and compositions of layered material systems for fluxless brazing of aluminum or dissimilar metals
CA 2736641 C · Owner: Dana Canada Corporation · Inventors: Hoffman, Richard A. (Deceased); Krueger, Robert H.; Dockus, Kostas F. (Deceased)
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A brazing product for fluxless brazing comprises a substrate which may , comprise aluminum or an aluminum alloy and a filler metal-forming material , system applied to the substrate. The filler metal-forming material system forms a , liquid filler metal when the brazing product is heated to a brazing temperature. , The filler metal-forming material system comprises a liquid-forming layer and a , braze-promoting layer. The liquid-forming layer comprises a coating of silicon, a , coating of an aluminum-silicon alloy having 20 percent silicon by weight or higher, or a coating comprised of sequential thin layers of aluminum and silicon. , The braze-promoting layer comprises one or more …
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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 November 21, 2002 and granted September 17, 2013. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended November 21, 2022.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 21, 2024.
- 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.