Tank bottom restoration process
CA 2229885 A1 · Owner: Marathon Oil Company · Inventors: Hutchison, Bradley D.; Ogden, Becky L.; Southwell, George P.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A process is provided for restoring the damaged bottom of a storage tank. The process is initiated by preparing a slurry containing unconsolidated solids and a gelation solution. The gelation solution includes an aqueous liquid solvent, a crosslinkable polymer, and a crosslinking agent. The slurry is placedon the internal bottom surface of the storage tank in a sufficient volume to fully cover the surface. The gelation solution is then gelled substantially to completion in the storage tank to form a gel that binds the unconsolidated solids and converts the slurry into a hardened conglomeration. The hardened conglomeration provides a coat over the internal bottom surface of the storage tank …
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 19, 1998. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended February 19, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 19, 2020.
- 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.