Fe-cu alloy sheet having an alloy structure of high uniformity
CA 2058437 C · Owner: Miyazawa, Kenichi · Inventors: Miyazawa, Kenichi; Mizoguchi, Toshiaki; Nishimura, Satoshi
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An Fe-Cu alloy sheet manufactured by a thin plate continuous casting method so as to be used as a material of electronic and magnetic parts. The alloy sheet has an alloy structure of high uniformity which contains 20 to 90% Cu, 1 to 10% Cr, 0.05 to 10% Mo and, one or more of alloying elements selected from the group consisting of A~, Sc, Y, La, Si, Ti Zr and Hf, whose amount or total amounts are not less than a calcualtion value of the following equation and not more than 10%, the balance being essentially Fe: (see fig. I), wherein .alpha. = 1, .beta. = 51 - % Cu (in the case where Cu = 20 to 50%), .beta. = -19 + 0.4 % Cu (in the case where Cu = 50 to 90%). Boron and/or carbon take …
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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 April 8, 1991 and granted February 23, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 8, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 8, 2013.
- 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.