Process for the treatment of used rubber and plastics
CA 2255330 C · Owner: Bovey, Richard · Inventors: Vuille, Jean-Pierre; Affolter, Jean; Bovey, Richard
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The process aims treatment of used rubber and plastics such as vehicle tyres, car fluff (plastic and rubber residues from shredded automobiles) and RDF (Refused Derived Fuel). A vacuum pyrolysis of cuttings of said rubber and plastics is made in a reactor to yield a non condensable fraction of combustible gas, oil, and a carbonaceous solid residue. A portion of the carbonaceous solid residue is mechanically mixed in the reactor to the rubber and plastics cuttings before and during pyrolysis thereof.
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 December 1, 1998 and granted July 22, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended December 1, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 1, 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.