Rustproof steel sheet for automobile fuel tank with excellent resistance weldability corrosion resistance and press moldability
CA 2261749 C · Owner: Okada, Nobuyoshi · Inventors: Okada, Nobuyoshi; Izaki, Teruaki; Maki, Jun
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A coating aluminized steel sheet suitable for fuel tanks, which comprises (a) a steel sheet (b) an, aluminized-plating layer formed on one or both sides of the steel sheet and based on aluminum or an aluminum alloy containing 2-15 wt% silicon, and (c) a coating layer formed on at least one of the aluminizing layers and selected from the group consisting of i) a resin chromate film having a film thickness of 0.1-2 µm and containing a resin and a chromic acid compound with the, resin/metal chromium weight ratio in the range of 0.5-18 ii) an inorganic-based chromate film with the coating layer formed to 10-200 mg/m2 in terms of metallic chromium, which comprises 100 parts by weight of a …
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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 July 31, 1997 and granted November 25, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended July 31, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 31, 2019.
- 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.