Well boring method and apparatus
CA 2206959 A1 · Owner: Boulard, Victor · Inventors: Boulard, Victor
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Apparatus is provided for removing soil from a well comprising a reservoir body with at least one outer wall defining an open cavity, means for lowering the reservoir body into the well into proximity with the bottom of the well and for removing the reservoir from the well without substantial spillage from the open cavity communication, means for transferring a jet of fluid into the well into contact with soil at the bottom of the well to create a slurry wave with the soil in the well, and containment means for directing the slurry wave to overflow into the reservoir body. The apparatus is employed for removing sand deposits from well shafts and for boring new well shafts, particularly …
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 June 4, 1997. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended June 4, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 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.