Machine structural steel product
CA 2323952 A1 · Owner: Sumitomo Metal Industries, Ltd. · Inventors: Okada, Yasutaka; Watari, Koji
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A machine structural steel product which comprises in mass %, 0.05 to 0.55 % , of C, 0.50 to 2.5 % of Si 0.01 to 2.00 % of Mn, 0.035 % or less of P 0.005 , to 0.2 % of S and 0.150 % or less of N and optionally further comprise one or more of Cu, Ni, Cr, Mo, V, Nb, Ti, B, Al Bi, Ca, Pb, Te, Nd and Se, with the , proviso that its chemical composition satisfies the formulae: -23C+Si (5-2Si)- 4Mn+104S-3Cr-9V+10 >= 0 and 3.2C+0.8Mn+5.2S+0.5Cr-120N+2.6Pb+4.1Bi- 0.001.alpha.2+0.13.alpha. >= 3.0, the balance being Fe and impurities contains ferrite phase in an amount of 10 to 80 % in the structure thereof and has a Hv hardness of 160 to 350, wherein .alpha. represents an area ratio of ferrite …
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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 January 25, 2000. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended January 25, 2020.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 25, 2022.
- 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
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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.