Martensitic stainless steel
CA 2532222 C · Owner: Nippon Steel & Sumitomo Metal Corporation · Inventors: Amaya, Hisashi; Kondo, Kunio
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A martensitic stainless steel having a resistance to sulfide stress corrosion cracking superior to Super 13 Cr steel and having a strength and corrosion resistance comparable to dual phase stainless steels has a chemical composition , consisting essentially of in mass %, C: 0.001 - 0.1%, Si: 0.05 - 1.0% Mn: , 0.05 -, 2.0%, P: at most 0.025%, S: at most 0.010% Cr: 11 - 18%, Ni: 1.5 - 10%, sol. , Al: 0.001 - 0.1%, N: at most 0.1%, O : at most 0.01% Cu: 0 - 5%, solid solution , Mo: , 3.5 - 7% the composition satisfying the following Equation (1) optionally at , least , one element selected from at least one of the following Groups A - C and a , remainder of Fe and impurities and …
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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 July 22, 2004 and granted January 29, 2013. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended July 22, 2024.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 22, 2026.
- 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.