Method and system for extracting a solute from a fluid using dense gas and a porous membrane
CA 2198872 C · Owner: Tastemaker · Inventors: Robinson, James R.; Sims, Marc J.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method and system (10) for extracting a solute from a fluid or a dense gas may include a dense gas supply (12) and a gas supply line (48) for delivering a dense gas to a pressure equalization chamber (122) and to a pressurizable module (16) containing a bundle of porous hollow fibers. The system (10) also may include a fluid supply (14) and fluid supply line (40) for delivering a fluid to the chamber (122) and to the module (16). The chamber (122) includes a floating diaphragm (26) and serves to substantially equalize the pressure of the fluid and dense gas so that the pressure on both sides of the membranes in the module (16) is essentially the same. At least one of the fluid and …
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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 January 17, 1995 and granted August 28, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended January 17, 2015.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 17, 2017.
- 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
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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.