Hot rolled high strength steel sheet with excellent formability
CA 2287502 A1 · Owner: Soshiroda, Tetsuo · Inventors: Soshiroda, Tetsuo; Nakaya, Michiharu; Mukai, Yoichi
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A high strength hot rolled steel sheet having good strength-elongation balance and stretch-flangability and being excellent in formability wherein the , composition of the steel satisfies the following requirements (by mass %): C is 0.05 to 0.15 %, Si is 0.5 to 2.0 %, Mn is 0.5 to 2.0 % P is 0.05 % or , less, S is 0.010 % or less Al is 0.005 or more and less than 0.10 % and Fe , and obligatory impurities account for the residue of steel wherein metal , systems present are mainly three phases of ferrite retained austenite and , bainite, the amount of ferrite V(F) being 60 to 95 % by area the amount of , retained austenite V(.gamma.) being 3 to 15 % by volume and the amount 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 March 12, 1999. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended March 12, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 12, 2021.
- 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.