Cold rolled steel
CA 2359818 A1 · Owner: Mukunthan, Kannappar · Inventors: Strezov, Lazar; Mukunthan, Kannappar
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Method of producing strip comprising continuously casting plain carbon steel into a strip of no more than 5 mm thickness and coiling the strip. The strip is subsequently uncoiled and cold rolled then annealed to produce a stress relieved microstructure therein. The cold rolling produces a cold reduction sufficient to increase the tensile strength off the strip to at least 680 MPa but is such that the total elongation to break off the strip after the annealing is in the range 8 % to 12 %. The cold rolling may produce a cold reduction of the strip thickness in the range 40 % to 80 %. The continuously cast strip may be optionally in-line hot rolled prior to coiling to produce an …
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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 11, 2000. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended January 11, 2020.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 11, 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
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.