Flexible hot rolled steel sheets having improved deep drawability
CA 2014039 C · Owner: Kawasaki Steel Corporation · Inventors: Hashiguchi, Koichi; Morita, Masahiko; Togashi, Fusao
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A flexible hot rolled steel sheet having an improved deep drawability comprises not more than 0.10 wt% of C, less than 0.20 wt% of Mn 0.10-2.0 wt% of, Cr, 0.002-0.100 wt% of Al and the balance being Fe and, inevitable impurities or further contains particular amounts of at least one of Ti, Nb and Zr and/or B. Such a hot rolled steel sheet has a tensile strength of not more than 35 kgf/mm2 and a total elongation of not less than 50%.
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 April 6, 1990 and granted June 23, 1998. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 6, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 6, 2012.
- 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.