Canadian application, no grantCanada
A process for non-thermal vapor extraction of viscous oil from a hydrocarbon reservoir using a vertical well configuration
CA 2270703 A1 · Owner: Alberta Energy Company Ltd. · Inventors: Chhina, Harbir Singh
Overview
Drawings and full text
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention provides processes and apparatus for the recovery of viscous oil from, reservoirs by means of generally vertical wells using unheated hydrocarbon solvents.
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 29, 1999. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended April 29, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 29, 2021.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledApril 29, 1999
GrantedNo grant recorded
Term endedApril 29, 2019
Patent numberCA 2270703 A1
Classification (IPC)E21B43/22 +2 more
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.