Epoxy resin systems modified with low viscosity statistical monofunctional reactive polymers
CA 2081448 A1 · Owner: Bertsch, Robert J. · Inventors: Siebert, Alan R.; Bertsch, Robert J.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Curable epoxy resins are toughened with statistical monofunctional carboxyl, amine or epoxy terminated reactive polymers and have low viscosities before cure thereby making them useful in a wide range of applications. The cured epoxy resin systems which are modified by the statistical monofunctional reactive polymers have physical properties, such as adhesion and elongation generally, equal to or better than those of cured epoxy resin systems modified with statistical difunctional reactive polymers. A process of preparation for the modified epoxy resin systems of the present invention includes admixing an epoxy resin with a statistical monofunctional carboxyl, amine, or epoxy terminated …
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 April 26, 1991. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended April 26, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 26, 2013.
- 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.