Surface-coated al/zn steel sheets and surface coating agent
CA 2464581 A1 · Owner: Hayashi, Yoshihiro · Inventors: Hayashi, Yoshihiro; Kinoshita, Yasuhiro; Ogino, Takao
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention relates to a surface-treated Al/Zn alloy-coated steel sheet onto which a coating is applied, which contains an acid amide bond-containing resin as a major constituent. Said coating can be with or without chrome. Said steel sheet can have a coating free from chrome which contains the following , components A B and C: A) a water-based resin, containing carboxyl groups and acid amide bonds, B) one or several metal compounds selected from the group , including Al Mg, Ca, Zn, Ni, Co, Fe, Zr, Ti, V, W, Mn and Ce compounds and C) a silicon compound. Such a steel sheet has an excellent alkali-resistance cold-rollability and corrosion resistance. Said invention also relates to 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 October 12, 2002. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended October 12, 2022.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 12, 2024.
- 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.