Method of treating heterogeneous formation with potassium hydroxide
CA 1291420 C · Owner: Tiorco, Inc. · Inventors: Frank, Jeffrey E.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Solid KCl is present in the front portion of a KOH treatment solution to facilitate placement of the solution in low permeability zones of a subterranean formation wherein KOH treatment is desired. The solid KCl temporarily plugs the high permeability zones enabling the KOH solution to enter the low permeability zones. After a period of time the solid dissolves in situ restoring permeability to the formation.
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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 October 29, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended October 29, 2008.
- 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
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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.