Chrome humates as drilling mud additives
CA 1332937 C · Owner: Firth, William Charles, Jr. · Inventors: Firth, William Charles, Jr.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A viscosity reducing and/or fluid loss additive useful as an ingredient in a water-based drilling fluid composition which comprises; the chrome humate product obtained upon reaction or complexation of a humate which has been obtained from association with a titanium mineral deposit, and an inorganic chromium compound.
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
- Granted November 8, 1994. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended November 8, 2011.
- 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.