Organic composite plated steel sheet highly susceptible to cationic electrodeposition
CA 2007905 C · Owner: Nippon Steel Corporation · Inventors: Shimazu, Takashi; Shindou, Yoshio
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention provides an organic composite plated steel sheet highly susceptible to cationic electrodeposition comprising a steel substrate plated with one selected from the group consisting of zinc a zinc alloy, a zinc composite alloy, or aluminum and a, first layer of a less soluble chromate film having a water soluble content of 5% or less formed on the substrate in an amount of 10 to 150 mg as the total amount of chromium per square meter, and a second layer as a solid thin coating film of 0.2 to 2 µm formed on the first layer the second, layer being formed with a coating composition containing 10 to 50% by weight of solids comprising: (a) 30% by weight or more of a bisphenol 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 January 17, 1990 and granted June 8, 1993. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended January 17, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 17, 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
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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.