Expired Canadian patentCanada
Process for reducing water influx into gas or oil producing wells
CA 1106162 A · Owner: Deutsche Texaco Aktiengesellschaft · Inventors: Grodde, Karl-Heinz
Overview
Drawings and full text
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A process for reducing the influx of water into petroleum production wells by the injection thereinto of emulsions of gels of polyacrylamides or partially hydrolyzed polyacrylamides in mineral oil.
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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 August 4, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended August 4, 1998.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledNovember 17, 1978
GrantedAugust 4, 1981
Term endedAugust 4, 1998
Patent numberCA 1106162 A
Classification (IPC)E21B33/13 +1 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.