Fluid injection apparatus and method with controlled volume displacement for use in subterranean wells
CA 2331473 A1 · Owner: Cook, Robert Bradley · Inventors: Carisella, James V.; Cook, Robert Bradley
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A fluid injection apparatus and method provides a controlled volume displacement for use, of the apparatus in a subterranean well. Pressure is applied within a conduit carrying the, apparatus into the well for activating a piston and contracting a chamber containing a treatment, fluid for ejection of the treatment fluid into the well. A plurality of chambers may be isolated by, the piston means relative to the conduit passageway for selective incremental, ejection of the fluid, and treatment of one or more zones or sections within the well.
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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 January 19, 2001. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended January 19, 2021.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 19, 2023.
- 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.