Catalytic devulcanization of rubber
CA 2589307 C · Owner: Mcfarlane, Richard Anthony · Inventors: Huang, Haibo; Mcfarlane, Richard Anthony; Lott, Roger Kai
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention generally relates to the devulcanization of rubber. Specifically for the recycling of rubber and rubber tires. A process for the , devulcanization of rubber is described comprising the steps of contacting , vulcanized rubber crumb with a rubber-swelling solvent capable of swelling the rubber to form solventcapable of swelling the rubber to form solvent-swollen vulcanized rubber; heating the solvent-swollen vulcanized rubber in the presence of a hydrogen source to initiate a devulcanization reaction to proceed for a time sufficient to effectively devulcanize the vulcanized rubber. A monophasic devulcanization solution comprising a hydrogenation catalyst precursor …
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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 November 28, 2005 and granted August 6, 2013. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended November 28, 2025.
- Certificates of supplementary protection extend only drug patents, and it isn't classified as one.
- 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.