Low fluid loss salt saturated cement slurries, additives and methods
CA 1296173 C · Owner: Burkhalter, John Fred · Inventors: Brothers, Lance Everett; Burkhalter, John Fred
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Low fluid loss salt saturated cement slurries liquid, fluid loss reducing additives for preparing slurries and methods of using the slurries in oil and gas well cementing operations are provided. The low fluid loss aqueous salt saturated cement slurries are comprised of hydraulic cement salt saturated water and the reaction product of polyethyleneimine and one or more sulfonated organic compounds.
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 February 25, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended February 25, 2009.
- 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.