Process for the separation of organic substances from an aqueous mixture
CA 2371770 A1 · Owner: Takors, Ralf · Inventors: Weuster-Botz, Dirk; Wandrey, Christian; Takors, Ralf
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention relates to a method for separating one or more organic substances which are present in an aqueous mixture and which contain at least one positively charged and/or chargeable nitrogenated group using extraction , via at least one porous membrane. Said method uses an extracting agent which contains at least partially long-chained organic compounds in addition to at , least one liquid cation exchanger and uses a membrane which can be wetted either by the aqueous mixture or by the extracting agent. In particular the , invention relates to a method for separating one or more organic substances which are present in an aqueous mixture and which contain at least one positively …
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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 26, 2000. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended April 26, 2020.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 26, 2022.
- 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.