Zinc-silica composite electroplated steel sheet excellent in corrosion resistance and spot weldability
CA 2037087 A1 · Owner: Shiohara, Yukimitsu · Inventors: Abe, Masaki; Shiohara, Yukimitsu
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A zinc-silica composite electroplated steel sheet excellent in corrosion resistance and spot weldability which comprises: a steel sheet; a first zinc-silica composite plating layer, formed on at least one surface of the steel sheet, in which silica particles are uniformly dispersed; and a second zinc-silica composite plating layer, formed on the first zinc-silica composite plating layer, in which silica particles are uniformly dispersed. The first zinc-silica composite plating layer has a content of silica particles within a range of from 0.1 to 20.0 wt.% relative to the first zinc-silica composite plating layer; the silica particles in the first zinc-silica composite plating layer have 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 February 26, 1991. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended February 26, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 26, 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
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.