Undercoat composition
CA 1338956 C · Owner: Imahigashi, Naofumi · Inventors: Inai, Toshimi; Motoi, Koji; Imahigashi, Naofumi
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An undercoat composition for a powder coating of a heat-resistance resin on a metal substrate at a high coating temperature is provided. The composition includes a specific imide prepolymer having the formula: wherein R1 is an aromatic tetracarboxylic acid residue; R2 is an aromatic diamine residue;, R3 is an unsaturated acid anhydride residue which does not include an acetyl group; and, ? is an integer and the mean value of ? is within the range of 0 to 5.
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 March 4, 1997. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended March 4, 2014.
- 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.