Processing of copper alloys
CA 1249736 A · Owner: Brush Wellman Inc. · Inventors: Church, Nathan L.; Cribb, W. Raymond; Harkness, John C.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
This invention is directed to the treatment of copper beryllium alloys, and to articles and parts made therefrom containing special small, amounts of beryllium and cobalt e.g. about 0.05% to about 0.5% beryllium and about 0.05% to about 2% cobalt, which imparts to these alloys a superior combination of stress relaxation resistance formability, ductility, conductivity and strength by the process of solution annealing cold working at least about 50% or at least about 70% or 90% or more and age hardening.
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
- Granted February 7, 1989. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended February 7, 2006.
- 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.