Process of preparing rhodium nitrate solution
CA 2063538 A1 · Owner: Ito, Hisaki · Inventors: Ichiishi, Satoshi; Ito, Hisaki
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
of Disclosure, Disclosed herein is a process of preparing a rhodium nitrate solution which comprises reacting rhodium hydroxide with nitric acid characterized in that the mixed solution of the rhodium hydroxide and the nitric acid is concentrated under heating. Rhodium nitrate prepared by a conventional method which comprises dissolving the precipitate of rhodium hydroxide which has been prepared by dissolving rhodium black in concentrated sulfuric acid under heating and controlling pH possesses low supporting efficiency on a support for preparing a catalyst. When the mixture of the rhodium hydroxide and the nitric acid is concentrated under heating according to the present invention the, …
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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 19, 1992. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended March 19, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 19, 2014.
- 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.