Composition comprising a polymer of carbon monoxide with ethylenically unsaturated compounds
CA 2076461 A1 · Owner: Machado, Joseph M. · Inventors: Machado, Joseph M.; French, Raymond N.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A composition comprising a blend of a linear alternating polymer of carbon monoxide with at least one ethylenically unsaturated compound, with a copolymer of a vinyl aromatic monomer and acrylonitrile monomer, wherein the copolymer contains from 45 wt% to 80 wt% acrylonitrile monomer, relative to the weight of the copolymer.
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 20, 1992. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended August 20, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 20, 2014.
- 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.