Method and apparatus for concentrating a solute in solution with a solvent
CA 2334137 A1 · Owner: Calfee, Richard V. · Inventors: Bueche, Kenneth M.; Calfee, Richard V.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method and an apparatus for forming a prescribed concentration of a substance in a mixture with a fluid from a dilute mixture which is a solution of a solute in a solvent, the apparatus (10) including a frame (12) carrying a vertically oriented syringe (14), a stepper motor (16) a laser micrometer , (18), a heater (38) for heating and evaporating a drop of the solution suspended from the syringe to concentrate the solution and further for , heating the concentrated solution after it has been loaded into a source evaporating the solvent and plating the solute onto the surface and a control , 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 June 4, 1999. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended June 4, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 4, 2021.
- 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.