Polyimide coating compositions
CA 1255422 A · Owner: E. I. Du Pont De Nemours And Company · Inventors: Merriman, Burt T. Jr.; Fryd, Michael
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Compositions for the application of planar and solvent resistant polyimide coatings comprising an aprotic solvent solution of selected aromatic dianhydrides which have been at least 20% esterified with a volatile alcohol and an equivalent amount of a mixture of amines comprising selected diamines and polyamines. PD-2121
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 June 6, 1989. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 6, 2006.
- 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.