Resin composition
CA 2465883 C · Owner: Noguchi, Tsutomu · Inventors: Noguchi, Tsutomu; Mori, Hiroyuki; Sato, Noritaka
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A polyester resin improved in crystallizability which comprises a cyclic , compound represented by the general formula: A1 - B - A2 wherein A1 and A2 are each independently a group represented by the formula: 1 P is an optionally substituted benzene ring; and B is an optionally substituted divalent hydrocarbon group and a polyester capable of taking a crystalline structure.
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 September 5, 2003 and granted March 27, 2012. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended September 5, 2023.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 5, 2025.
- 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.