Dicarboxylic acid azomethines and high glass transition temperature polyester products produced therefrom
CA 1286676 C · Owner: Chattha, Mohinder S. · Inventors: Chattha, Mohinder S.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
This invention is directed to acid terminated azomethines formed by reacting aromatic dialdehydes or aromatic diketones with amino-carboxylic acid compounds. These azomethines may be reacted with epoxy resins to produce polymer material having high glass transition temperatures.
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 July 23, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended July 23, 2008.
- 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.