High-strength, notch-ductile precipitation-hardening stainless steel alloy
CA 2232679 C · Owner: Martin, James W. · Inventors: Dulmaine, Bradford A.; Kosa, Theodore; Martin, James W.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A precipitation hardenable, martensitic stainless steel alloy is disclosed consisting essentially of, in weight percent about C 0.03 max, Mn 1.0 max, Si , 0.75 max P 0.040 max, S 0.020 max, Cr 10 - 13, Ni 10.5 - 11.6 Ti 1.5 - 1.8, Mo 0.25 - 1.5, Cu 0.95 max Al 0.25 max, Nb 0.3 max, B 0.10 max, N 0.030 max the balance essentially iron. The disclosed alloy provides a unique combination of stress-corrosion cracking resistance strengh, and notch , toughness.
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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 September 5, 1996 and granted December 10, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended September 5, 2016.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 5, 2018.
- 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.