Resin composition and a process for preparing laminates therefrom
CA 1292824 C · Owner: Sexton, Diane · Inventors: Sexton, Diane
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An epoxy resin composition having exceptional stability which is useful in the preparation of electrical laminates comprises an epoxy resin such as the diglycidyl ether of bisphenol A, an organic solvent a, polyhydric phenolic hardener and an acid having a pKa at 25°C of less than 2.5 or an ester or anhydride of such acid. The epoxy resin composition can also contain a bishenol or bisphenol derivative such as bisphenol A. In addition, an accelerator such as an alkyl substituted imidazole can also be added to the composition prior to its use as in the preparation of electrical laminates.
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 December 3, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended December 3, 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.