Process for purifying hydroxide compounds
CA 2217625 A1 · Owner: Sachem, Inc. · Inventors: Mooney, John E.; Sharifian, Hossein
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
In one embodiment, the invention relates to a process for purifying solutions containing a hydroxide compound including the steps of: (A), providing an electrochemical cell containing an anode a cathode, a cation, selective membrane and bipolar membrane the bipolar membrane having, an anion selective side facing the anode and a cation selective side facing the cathode, wherein the cation selective membrane is positioned between the anode and the bipolar membrane, and the bipolar membrane is positioned between the cation selective membrane and the cathode thereby defining a, feed compartment between the cation selective membrane and the anode a, recovery compartment between the bipolar …
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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 October 2, 1997. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended October 2, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 2, 2019.
- 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.