Improvements in fluxless brazing
CA 2779474 C · Owner: Dana Canada Corporation · Inventors: Dockus, Kostas F. (Deceased); Liang, Feng; Cheadle, Brian E.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method of manufacturing an article of manufacture for use in a fluxless brazing process is disclosed. The method comprises: (a) providing a substrate containing aluminum; and (b) electroplating a braze-promoting layer onto said substrate said braze-promoting layer comprising one or more metals selected from nickel and cobalt; wherein the electroplating is carried out in an aqueous bath having a pH of from about 2 to 7 and including in solution, ions of said one or more metals citrate ion and ammonium ion, wherein the mole ratio of metal ions: citrate ion: ammonium ion in solution is about 1: 0.5 to 1.5: 1 to 6.
Read the whole patent
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
Timeline From CIPO dates
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.