Rubber reduction
CA 2426253 A1 · Owner: Harrison, Brian H. · Inventors: Hooper, Hurdon A.; Harrison, Brian H.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A process for reducing rubber is provided. The process includes the steps of providing the rubber to a reactor, providing a solvent to the reactor elevating a, temperature within the reactor to a temperature wherein the temperature is below a, critical temperature of the solvent elevating a pressure within the reactor to a pressure of, at least the saturated vapour pressure of the solvent at the temperature reducing the, rubber for a specified time and producing a reaction product.
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 April 22, 2003. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended April 22, 2023.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 22, 2025.
- 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.