Top coating compositions
CA 2203460 C · Owner: Kawazu, Kenji · Inventors: Kiyata, Hiroaki; Kawazu, Kenji; Kawamura, Chikara
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A top coating composition comprising:, (A) A hydroxyl-containing vinyl resin containing 40 to 90 wt.% of an aromatic hydrocarbon ring-containing vinyl monomer as a monomer component optionally in combination with (B) a hydroxyl-containing polyester resin, (C) hexamethoxymethylmelamine and/or an etherified melamine resin obtained by substituting a part or the whole of the methoxy groups in hexamethoxymethylmelamine by an alkoxy group monovalent alcohol having at least 4 carbon atoms, (D) a particulate polymer having an average particle diameter of 0.01 to 1 µm, and (E) a polysiloxane compound represented by the formula I. The coating composition of the present invention can form a coating …
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
- Filed April 23, 1997 and granted December 11, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 23, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 23, 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.