Apparatus and method for subterranean injection of slurried wastes
CA 2185259 C · Owner: Terralog Technologies Inc. · Inventors: Dusseault, Maurice B.; Bilak, Roman A.; Rothenburg, Leonard
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention is an apparatus and method for injection of wastes in slurry form within an underground formation. The method consists of: identifying a suitable target stratum; calculating the approximate total available storage volume of the target strata; injecting a slurry of waste materials into a well in a series of injection episodes separated by interinjection periods; measuring the well bottom pressure of the slurried wastes during each injection episode and interinjection period; and terminating the injection process when the target strata is saturated with slurried wastes. An injection episode is terminated when the well bottom pressure begins to climb substantially above the …
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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
- Filed September 11, 1996 and granted May 30, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended September 11, 2016.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 11, 2018.
- 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.