Graft polymers of functionalized ethylene-alpha-olefin copolymer with polypropylene, methods of preparation, and use in polypropylene compositions
CA 2000655 A1 · Owner: Exxon Chemical Patents Inc. · Inventors: Datta, Sudhin; Datta, Sudhin; Lohse, David J.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Graft polymer comprising functionalized ethylenealpha-olefin copolymer having polypropylene grafted thereto through one or more functional linkages the process for, making the graft polymer comprising combining the functionalized ethylene-alpha-olefin with maleated polypropylene the use of the graft polymer for improving the impact properties of polypropylene compositions and improved poly-, propylene blends.
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 13, 1989. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended October 13, 2009.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 13, 2011.
- 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.