Segmented elastomer
CA 2022412 A1 · Owner: Hsu, Wen-Liang · Inventors: Halasa, Adel F.; Hsu, Wen-Liang
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
It is important for tire treads to exhibit good wet skid resistance, low rolling resistance good wear, characteristics and good abrasion resistance. This is often accomplished by utilizing a blend of various rubbers in making tire tread compositions. However some of the desirable characteristics of the individual rubbers in the blend are frequently lost on mixing. The segmented elastomers of this invention offer a unique combination of desirable characteristics for utilization in making tire tread compositions. This invention more specifically discloses a rubber polymer which has an excellent combination of properties for use in making tire treads which is comprised of: (a) a first segment …
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 31, 1990. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended July 31, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 31, 2012.
- 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.