Storage tank for two fluids of different density
CA 2017435 C · Owner: Chicago Bridge & Iron Technical Services Company · Inventors: Andrepont, John Stephen; Saint, Chapin Oscar; Wozniak, Robert Stanley
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An enclosed storage tank for the simultaneous addition and removal, and storage, of two liquid layers of different density comprising a tank shell having a bottom, a side wall extending upwardly from the bottom a roof supported at least in part by the side wall and at least one vertical tubular column extending upwardly from the shell bottom to at least close to the roof; a substantially horizontal first distributor plate above which the column extends and with the plate spaced above but adjacent to the shell bottom; first openings in the column between the first distributor plate and the shell bottom; a high density liquid conduit extending from outside the shell to the column interior …
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 May 24, 1990 and granted May 2, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended May 24, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 24, 2012.
- 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.