Electroplated steel sheet having a plurality of coatings, excellent in workability, corrosion resistance and water-resistant paint adhesivity
CA 2018196 C · Owner: Sagiyama, Masaru · Inventors: Morita, Masaya; Kawabe, Masaki; Sagiyama, Masaru
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An electroplated steel sheet having a plurality of coatings, excellent in workability, corrosion resistance and water-resistant paint adhesivity, which comprises: an iron-chromium-zinc alloy coating as a lower layer, having a coating weight of from 0.1 to 40 g/m2 per side, formed on the surface of a steel sheet consisting, essentially of:, iron : from 3 to under 15 wt.% chromium : from 0.1 to 1 wt.%, and, the balance being zinc and incidental impurities; another iron-chromium-zinc alloy coating as an intermediate layer, having a coating weight of from 20 to 59.9 g/m2 per side, formed on the iron-chromium-zinc alloy coating as the lower layer, consisting essentially of: iron : from 10 to 40 …
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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 4, 1990 and granted January 5, 1993. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended June 4, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 4, 2012.
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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.