Flat product, such as sheet metal, made of steel with high yield strength having good ductility and method for making same
CA 2337260 A1 · Owner: Recherche Et Developpement Du Groupe Cockerill Sambre, Rd-Cs · Inventors: Harlet, Philippe; Eberle, Klaus; Cantinieaux, Pierre
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention concerns a flat product made of multiphase steel and a method for preparing said steel comprising the following steps: hot rolling at a temperature at which the austenitic phase is stable; tempering to form a C and Mn-enriched phase in a ferrite matrix; heat treatment to form austenite islands and/or enriching in Mn the already formed austenite and cooling down to room temperature so as to obtain a final product with a ferrite matrix containing residual austenite bainite and/or martensite islands.
Read the whole patent
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 7, 1999. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended July 7, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 7, 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.