Drilling mud filtration device
CA 2503565 A1 · Owner: Herst, Neil · Inventors: Herst, Neil
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A filter system for filtering drill bit cuttings shavings, and other abrasive , articles from a drilling mud that is passed through an oil or gas well drilling system (10) is provided that includes an overhead drilling system (23), a drill string (19) connected to the overhead drilling system (23) and , a mud filter (26) for filtering the drilling mud wherein the mud filter (26) , is disposed within a drilling mud fluid passageway (8) that extends from the entry point of the drilling mud into the overhead drilling system and the entry point of the drilling mud into the drill string (19).
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 3, 2003. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended June 3, 2023.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 3, 2025.
- 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.