Polyolefin compositions having improved low temperature toughness and methods therefor
CA 2408337 A1 · Owner: Exxonmobil Chemical Patents Inc. · Inventors: Wouters, Guy J.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Disclosed are blends of a propylene-based polymer an elastomer, and , optionally an ethylene-based polymer having improved low temperature , toughness and methods of making such blends. The elastomer is preferably a copolymer of ethylene, one or more C3-C20.alpha.-olefin comonomers and , optionally one or more non-conjugated diene comonomers having an MLRA/ML , ratio of at least 8 and an ethylene content of from 74 to 95 mole percent.
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 March 1, 2001. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended March 1, 2021.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 1, 2023.
- 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.