System for washing a tank and recovering and treating residual tank liquid and method of operating the system
CA 2106841 C · Owner: Ando, Masaaki · Inventors: Manabe, Nobuyuki; Ando, Masaaki
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A system for washing a tank and recovering and treating residual tank liquid comprises a first system unit equipped with a suction device for sucking and discharging residual tank liquid, a second system unit equipped with an oil-water separator for separating oil from the discharged residual liquid, a device for treating the separated oil and means for supplying a washing liquid into the tank a, third system unit equipped with an inert gas generator and, first, second and third conveyance means for conveying the first, second and third system units to the tank to be treated. The invention also provides a method of operating the system.
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 September 23, 1993 and granted August 31, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended September 23, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 23, 2015.
- 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.