Method for obtaining an elastomer product with high petroleum and its by-products absorption power
CA 2066675 A1 · Owner: Oliveira Da Cunha Lima, Luiz C. · Inventors: Oliveira Da Cunha Lima, Luiz C.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method is disclosed for obtaining an elastomer product with high petroleum and its by-products absorption power derived from, devulcanized rubber, originated from tires heels, soles, etc. blended or not with resins pigments, fibers, devulcanizers, and, green rubbers used in the form of powder, grains or sheets.
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 July 24, 1991. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended July 24, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 24, 2013.
- 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.