High strength foamed well cement compositions and methods
CA 2337372 A1 · Owner: Chatterji, Jiten · Inventors: Bennett, Billy J.; Zamora, Frank; Anderson, Clyde R.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
High strength foamed well cement compositions and methods of cementing subterranean zones penetrated by well bores are provided. The foamed well cement, compositions are basically comprised of a hydraulic cement hydrophilic , fibers, water, sufficient to form a pumpable slurry a mixture of foaming and foam , stabilizing surfactants and sufficient gas to foam the slurry.
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 15, 2001. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended February 15, 2021.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 15, 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.