Well regeneration apparatus and method of regenerating wells
CA 2209960 A1 · Owner: Blank, Karl-Heinz · Inventors: Blank, Karl-Heinz
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A well regeneration apparatus and method of accomplishing same are provided. A scrubber pump is associated with a device for mechanically cleaning a well casing for washing and scrubbing a filter pipe portion of the well casing and a gravel bed that, surrounds the well casing by means of a fluid. A feed pump is, disposed above the scrubber pump and the pressure side of the, feed pump is connected to a riser that leads out of the well. A pump chamber of the scrubber pump communicates with the suction side of the feed pump. A further chamber is disposed in the vicinity of the scrubber pump and serves to accommodate the mechanically cleaning device. The pump chamber of the scrubber pump is …
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 July 4, 1997. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended July 4, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 4, 2019.
- 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.