Method and device for disposing of a solution containing an organic acid
CA 2186617 C · Owner: Areva Np Gmbh · Inventors: Bege, Dietmar; Bertholdt, Horst-Otto
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method and a device are provided for disposing of an aqueous solution than contains an organic acid and an iron complex and occurs particularly in the decontamination of radioactively contaminated surfaces of components. It is contemplated that the iron complex in the solution is reduced by irradiation with UV light. A dissolved iron salt and carbon dioxide, which is given off, are formed in the process. A oxidant is then added to the solution that contains the dissolved iron salt and the organic acid. This produces water and the iron complex foams once again. Some of the dissolved iron salt is removed from the solution by means of a cation exchanger. The solution containing the iron …
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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 28, 1995 and granted October 30, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 28, 2015.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 28, 2017.
- 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.