Non-destructive oil recovery method
CA 2337594 A1 · Owner: Daum, George Kevin · Inventors: Daum, George Kevin
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method of non-destructive recovery of oil or other petroleum hydrocarbon from a contaminated substrate comprises the steps of separating the hydrocarbon substantially intact from the substrate by applying a hydrocarbon removing agent to the substrate and collecting the hydrocarbon separated from the substrate. The separation of the hydrocarbon is effected by applying a separation agent such as an, alkali, to the substrate to effect adhesion failure of the hydrocarbon, thereby to release the hydrocarbon intact from the substrate and applying a surfactant to suspend the hydrocarbon removed from the substrate. The separation agent and the surfactant collectively comprise the hydrocarbon …
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 February 20, 2001. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended February 20, 2021.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 20, 2023.
- 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.