Rubber compounds containing polymeric bis-succinimide polysulfides
CA 2245329 A1 · Owner: The Goodyear Tire & Rubber Company · Inventors: Wideman, Lawson Gibson; D'Sidocky, Richard Michael
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 rubber compounds containing polymeric bis-succinimide polysulfides of the formula:, (see fig.I), wherein R is selected from the group consisting of phenylene and xylylene; R1 is selected from the group consisting hydrogen and alkyls having from 1 to 18 carbon atoms; x is an integer of from 2 to 8 and y is an integer of from 2 to 10.
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 19, 1998. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended August 19, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 19, 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.