Multiple coated composite steel strip
CA 1324975 C · Owner: Hiraoka, Teruyoshi · Inventors: Hiraoka, Teruyoshi; Odashima, Hisao; Hirano, Yoshihiko
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A multiple coated composite steel strip having an excellent corrosion (rust) resistance, weldability and paint adhesion, and thus useful for car bodies comprises a steel strip substrate, a first metal coating layer, a second chlorate coating layer formed by an electrolytic chromate treatment method containing 40 to, 120 mg/m2 of chromium and having a content of Cr2O3 of 45% by weight or more, and a third resinous coating layer comprising a homopolymer or copolymer of acrylic acid, methacrylic acid, acrylic acid ester or methacrylic acid ester and 15% to 40% of colloidal silica particles having a very small size of 1 to 12 m µm.
Read the whole patent
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
- Granted December 7, 1993. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended December 7, 2010.
- 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.