Installation for effluent producing well
CA 2230771 A1 · Owner: Beauquin, Jean-Louis · Inventors: Beauquin, Jean-Louis
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Installation for effluent producing well comprising a well casing (16) in the well (10) forming a drainage channel for effluent between a reservoir bed of rock (14) and an outlet (30) the well casing (16) comprising a choke (36) designed to ease the flow of effluent in the well casing and forming an annular space (20) in conjunction with the side of the well shaft (18). According to the invention the installation also comprises an insulating sleeve (38) in the annular space extending partway down the well.
Read the whole patent
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 March 17, 1998. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended March 17, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 17, 2020.
- 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.