Polypropylene polymers
CA 2420465 A1 · Owner: Yeh, Susan C. (Chien) · Inventors: Chen, Michael C-C.; Lin, Chon-Yie; Yeh, Susan C. (Chien)
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Embodiments of the present invention include a polypropylene homopolymer synthesized from a metallocene catalyst system and methods of forming the homopolymer, the homopolymer having an aluminium and chlorine recoverables value of less than 25 ppm and a xylene solubles of less than 1 wt% relative to the total weight of the homopolymer. The resulting homopolymer has other desirable properties such as a heat deflection temperature at 0.45 MPa of from 90 ~C to 110~C, and a MWD value of from 1.7 to 5Ø These properties make embodiments of the homopolymer desirable for films and in particular for , capacitor films.
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 22, 2001. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended August 22, 2021.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 22, 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.