Restoring current efficiency by temporary suspension of electrolysis and reduced catholyte concentration
CA 1282029 C · Owner: Suhara, Manabu · Inventors: Suhara, Manabu; Takeshita, Isamu; Suzuki, Kohji
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
In the electrolysis of sodium chloride by means of a perfluoro cation exchange membrane for the production of sodium hydroxide having a concentration of from 32 to 40% by weight, a method for restoring the current efficiency which comprises suspending the electrolysis when the current efficiency of the perfluoro cation exchange membrane has dropped to a predetermined level and, maintaining the sodium hydroxide concentration at a level of not higher than 30% by weight.
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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
- Granted March 26, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended March 26, 2008.
- 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.