Synthesis of onium hydroxides from onium salts
CA 2285230 A1 · Owner: Hulme, David R. · Inventors: Sharifian, Hossein; Hulme, David R.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention provides a process for preparing onium hydroxide from a corresponding onium salt and for purifying onium hydroxide including providing an electrochemical cell containing a cathode an anode, a divider and a , bipolar membrane the bipolar membrane having an anion selective side facing the anode and a cation selective side facing the cathode wherein the divider , is positioned between the cathode and the bipolar membrane and the bipolar , membrane is positioned between the divider and the anode thereby defining a , feed compartment between the divider and the bipolar membrane a recovery , compartment between the divider and the cathode and a water compartment , between …
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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 March 31, 1998. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended March 31, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 31, 2020.
- 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.