Heat-curable bismaleimide resins
CA 2023666 C · Owner: Peter, Roland · Inventors: Eisenbarth, Philipp; Peter, Roland; Folda, Thomas
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Heat-curable bismaleimide, resins containing an aromatic alkenyl compound prefer-, ably o,o'-diallylbisphenol A, and a Lewis acid as an additive for prolonging the pot life at elevated temperatures are suitable for impregnating reinforcing fibers rovings so impregnated having a prolonged gel time and being usable for fabrication of wound structures.
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 August 21, 1990 and granted February 12, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended August 21, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 21, 2012.
- 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.