Use of calcium sulfonate based threaded compounds in drilling operations and other severe industrial applications
CA 2523887 C · Owner: Mcdonald, Herschel · Inventors: Mcdonald, Herschel; Blake, Tom; Oldiges, Donald A.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention discloses the use of calcium sulfonate based greases compounds for use in application where the compounds are continuously periodically or intermittently exposed to fluids that tend to contamination erode, ablate or otherwise remove or interfere with the compounds ability to protect contact surfaces such as those present in threaded connections and, especially in threaded connections associated with oilfield applications. The present invention also discloses methods for making and using such greases and compounds in application where the compounds are continuously periodically or , intermittently exposed to fluids that tend to contamination erode, ablate or , …
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 28, 2004 and granted December 9, 2014. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 28, 2024.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 28, 2026.
- 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.