Polyolefin/thermoplastic polyurethane compositions made from hydroxy-terminated polydiene polymers
CA 2295796 A1 · Owner: Cenens, Jozef Lucien Rudolf · Inventors: Cenens, Jozef Lucien Rudolf
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A polyolefin/thermoplastic polyurethane composition which comprises: (a) from 99 to 80 percent by weight (wt.%) of a polyolefin and (b) from 1 to 20 wt.% , of a thermoplastic polyurethane composition having an OH/NCO molar ratio of 0.9 to 1.1 which is comprised of: (1) from 90 to 40 wt.% of a hydrogenated polydiene diol having a hydroxyl equivalent weight of 750 to 10,000 (2) from , 5 to 50 wt.% of a diisocyanate and (3) from 4 to 14 wt.% of a chain extender having a functional group equivalent weight of from 30 to 300.
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 July 8, 1998. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended July 8, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 8, 2020.
- 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.