Resin composition and method of manufacturing the same
CA 2010179 C · Owner: Dainippon Ink And Chemicals, Inc · Inventors: Saito, Tadao; Ito, Shichinosuke; Kagaya, Katsuo
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Disclosed is a thermosetting resin composition which comprises, (a) an unsaturated polyester (b) a polymer having a (meth)acrylate group only at one or both terminals of its main chain, (c) a poly(meth)acrylate oligomer (d) a styrene monomer, and, (e) a methyl methacrylate monomer. Also a method of molding the resin is disclosed which, comprises dividing the thermosetting resin composition into two parts, adding a curing agent to one of the two parts and a curing accelerator to another to form two partial compositions, introducing the two partial compositions into a mold, and allowing the two partial compositions to mix with each other and cure.
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 February 15, 1990 and granted November 18, 1997. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended February 15, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 15, 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.