Method and device for the disposal of a cation exchanger
CA 2194293 C · Owner: Areva Np Gmbh · Inventors: Gassen, Rainer; Bertholdt, Horst-Otto
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
the invention concerns a method and a device for the disposal of a cation exchanger (3) contaminated with radioactive and inactive rations. The invention calls for the inactive cations which are not bivalent to be converted into anionic complexes and these complexes to be flushed out of the exchanger (3). Far this purpose the cation exchanger (3) is connected to a feed line (4) for a complexing agent and to a discharge line (6).
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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 June 21, 1995 and granted January 29, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended June 21, 2015.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 21, 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
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.