Unsaturated siloxy compounds
CA 2311693 A1 · Owner: The Goodyear Tire & Rubber Company · Inventors: Materne, Thierry Florent; Kayser, Francois; Lauer, Wolfgang
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention relates to compounds of the formula, (see formula I), where R1, R2 and R3 are independently selected from alkoxy radicals having from 1 to 8 carbon atoms and R4 is selected from the group consisting of alkenylenes arylenes and alkyl-substituted arylenes having from 4 to 40 carbon atoms. These compounds may be used as silica couplers in rubber compositions.
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 June 13, 2000. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended June 13, 2020.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 13, 2022.
- 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.