Recovery of petroleum
CA 1059431 A · Owner: Dismukes, Newton B. · Inventors: Dismukes, Newton B.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The specification discloses an improvement in methods for recovery of petroleum substances from underground accumulations in earth strata. Disclosed are means to enhance the contribution of compaction to recovery through well bores and more particularly the recovery of viscous liquids and semi-liquids such as tars and bitumens. Because means are shown for the recovery of earth strata solid materials associated with petroleum substances the present invention also is applicable to the recovery of any underground substance whether liquid or solid, which may be disintegrated by hydraulic or mechanical means at a distance from a well. Broadly speaking this is a method of recovering petroleum …
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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
- Granted July 31, 1979. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended July 31, 1996.
- 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.