Phenylamine-containing elastomers and products having reduced hysteresis
CA 2086406 A1 · Owner: Doshak, John M. · Inventors: Hergenrother, William L.; Doshak, John M.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A vulcanizable elastomeric compound and products such as pneumatic tires and the like, are formed from a functionalized polymer having a functional groupderived from the polymerization initiator. The polymerization initiator is selected from the group consisting of, and, where R1 and R2 are the same or different and are selected from the group consisting of alkyls having from 1 to about 12 carbon atoms cycloalkyls having, from 3 to about 14 carbon atoms and aryls having from 6 to about 20 carbon atoms. Methods of the present invention include preparing the initiator preparing, functionalized polymers and reducing the hysteresis of vulcanizable elastomericcompounds.
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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 December 29, 1992. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended December 29, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 29, 2014.
- 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.