Surface conditioner and method of surface conditioning
CA 2497752 C · Owner: Nippon Paint Co. Ltd. · Inventors: Nakazawa, Toshiko
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
It is an object of the present invention to provide a surface conditioner which can inhibit galvanic corrosion on an aluminum alloy during chemical conversion treatment and can form a sufficient chemical conversion coat when applied to an aluminum alloy and a high tensile strength steel sheet and has the excellent stability of dispersion in a treatment bath. A surface conditioner containing zinc phosphate particles and having a pH of 3 to 12 wherein said zinc phosphate particles have D50 of 3 µm or less and said surface conditioner contains at least one species selected from the group consisting of (1) carboxylate group-containing copolymers obtained by copolymerizing a monomer composition …
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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 18, 2005 and granted February 5, 2013. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended February 18, 2025.
- Certificates of supplementary protection extend only drug patents, and it isn't classified as one.
- 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.