Flexible cementing compositions and methods for high-temperature wells
CA 2517562 C · Owner: James, Simon · Inventors: James, Simon; Le Roy-Delage, Sylvaine
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A well cementing composition comprises an hydraulic cement and flexible acrylonitrile-butadiene copolymer particulate material. A method of cementing a well comprises mixing the composition with sufficient water and optionally, other additives to form a pumpable slurry and pumping the slurry into the , well and allowing it to set.
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 February 18, 2004 and granted September 11, 2012. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended February 18, 2024.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 18, 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.