System and process for in tank treatment of crude oil sludges
CA 2295723 A1 · Owner: Powell, John E. Jr. · Inventors: Powell, John E. Jr.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method for removing a sludge (62) from a crude oil tank (60) while recovering hydrocarbons from the sludge (62). The method is carried in the crude oil tank (60), is studied to determine a preferred treatment fluid. Once the treatment fluid is in place in the tank (60) the contents are vigorously , mixed and agitated. Subsequently the contents of the tank (60) are sampled and any recovered hydrocarbons are removed followed by removal of the , treatment fluid.
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 June 29, 1998. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended June 29, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 29, 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.