Device for pumping slurry
CA 2304430 A1 · Owner: Mono Pumps Limited · Inventors: Ball, Kenneth; Thomas, Gareth David
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A device for pumping slurry, e.g. mud containing drill cuttings generated during, drilling for oil or the like, comprises a generally horizontally disposed macerator, having two counter-rotating shafts with alternating cutters and spacers above which, is mounted a vertically orientated progressing cavity pump. The spaces in the macerator are axially thicker than the cutting discs so that the macerator will pass, particles of a size acceptable to the pump. Impellors horizontally adjacent to the, macerator are provided for agitating the slurry to be pumped.
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 April 5, 2000. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended April 5, 2020.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 5, 2022.
- 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.