Method for disposing of metal cations
CA 2350206 A1 · Owner: Bertholdt, Horst-Otto · Inventors: 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 relates to a method for disposing of metal cations by binding them to a cationic exchange resin. The aim of the inventive method is to reduce the valency of the metal which produces the metal cations to the smallest possible value. The metal cations whose metal has the smallest possible valency is bound to the cationic exchange resin. The valency of the metal is reduced, for example, by chemical reduction. For this purpose for , example, an organic compound and UV radiation are used.
Read the whole patent
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 25, 1999. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended October 25, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 25, 2021.
- 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.