Heat curable toughened epoxy resin compositions
CA 2173219 C · Owner: Eftec North America, L.L.C. · Inventors: Jorissen, Steven Andrew; Ferguson, Gregory Alexander; Imirowicz, Krystyna
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
This invention is a two-part induction-curable epoxy adhesive comprising a first part of a polyfunctional epoxy such as a sorbitol epoxy, and a diepoxy compound such as a diepoxy bisphenol-A wherein a portion of the diepoxy compound may preferably comprise a glycol-based epoxy having an epoxy equivalent weight of at least about 250. The second part of the adhesive is a curing agent which preferably may be a mixture of nitrogen-based compounds and a toughening agent. The invention also comprises a method of adjoining two substrates by applying the adhesive composition of the invention and curing as well as the article resulting from this method.
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 October 5, 1994 and granted May 30, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended October 5, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 5, 2016.
- 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.