Cold-rolled steel sheet for deep drawing and method of producing the same
CA 2024945 C · Owner: Kawasaki Steel Corporation · Inventors: Satoh, Susumu; Matsuoka, Saiji; Uesugi, Nobuhiko
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A cold-rolled steel sheet suitable for deep drawing has a composition containing up to about 0.005 wt% of C up to, about 0.1 wt% of Si, up to about 1.0 wt% of Mn up to about, 0.1 wt% of P, up to about 0.05 wt% of S about 0.01 to 0.10, wt% of A?, up to about 0.005 wt% of N one, two or more, elements selected from the group consisting of about 0.01 to 0.15 wt% of Ti, about 0.001 to 0.05 wt% of Nb and about 0.0001 to 0.0020 wt% of 8, and the balance substantially Fe and incidental impurities. The steel sheet exhibits a Lankford value (r-value) of about ? ? 2.8 and also exhibits the difference (rmax - rmin) between the maximum value rmax and the minimum value rmin satisfying the condition of …
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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 September 10, 1990 and granted January 4, 1994. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended September 10, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 10, 2012.
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Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.