Method for mixing and separating two liquid phases and an apparatus for realizing the method
CA 2039676 C · Owner: Lilja, Launo Leo · Inventors: Lilja, Launo Leo; Hultholm, Stig-Erik; Makitalo, Valto Johannes
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method and apparatus are disclosed for mixing two liquid phases in a controlled fashion without employing high circumferential speeds of the stirrer and for then, separating these dispersed liquids. The apparatus of the invention includes a mixer in which a rotating helical stirrer maintains liquid circulation and uniform mixing of the two liquid phases. The dispersion flows out of the mixer, and into a settling system in which the flow velocity is varied to encourage coalescence and separation of the two phases.
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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 April 3, 1991 and granted December 6, 1994. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 3, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 3, 2013.
- 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.