Method and plant for the manufacture of a strip of formable steel
CA 2225752 C · Owner: Pronk, Cornelis · Inventors: Cornelissen, Marcus Cornelis Maria; Pronk, Cornelis; Den Hartog, Huibert Willem
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method for the manufacture of a strip of formable steel comprises the steps of (i) forming liquid steel by continuous casting into a slab having a thickness of not more than 100 mm, (ii) rolling the slab in the austenitic region into an intermediate slab having a thickness in the range 5 to 20 mm (iii) cooling the intermediate slab to below the Ar3 temperature (iv) holding , the intermediate slab in an enclosure for temperature homogenisation (v) , rolling the intermediate slab into strip with at least one rolling pass , applying a thickness reduction of more than 50 % at a temperature below Tt , and above 200 ~C where Tt is the temperature at which 75 % of the steel is converted into …
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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 June 28, 1996 and granted May 29, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended June 28, 2016.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 28, 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
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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.