Copper-nickel-silicon-chromium alloy
CA 2032993 A1 · Owner: Ingerson, Quentin F. · Inventors: Ingerson, Quentin F.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Abstract of the Disclosure, A copper-nickel-silicon-chromium alloy having the combination of high hardness and high electrical conductivity. The alloy is composed by weight of 8.5% to 11.5% nickel, in an amount sufficient to provide a nickel-silicon ratio of 3.4 to 4.5, 0.5% to 2.0% chromium, and the balance copper. The alloy is heat treated by initially heating the alloy to a solution temperature and is thereafter quenched. The quenched alloy is then aged to precipitate the metal silicides. Because of the specific ratio of nickel to silicon the, heat treated alloy develops during heat treatment a hardness in excess of 30 Rockwell C and an electrical conductivity in excess of 24% of pure …
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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 December 21, 1990. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended December 21, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 21, 2012.
- 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.