Drilling mud
CA 2406796 A1 · Owner: Cowan, Kenneth Michael · Inventors: Rock, Ronald Lee Sr.; Van Oort, Eric; Mcneil, Robert Irving Iii
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The drilling mud with a lowered coefficient of friction comprising a silicatebased mud and a lubricant selected from the group comprising glycosides alkylpolyalkoxyalcohols, alcohol ester polymers amine phosphates, starch and , combinations thereof.
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 19, 2001. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended April 19, 2021.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 19, 2023.
- 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.