Method and device for producing pure elemental iodine
CA 2066673 C · Owner: O'Dowd, Dennis H. · Inventors: O'Dowd, Dennis H.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method and device for producing thermodynamically free iodine in which a source material containing , thermodynamically free iodine is introduced to one side of an iodine solving solid barrier through which the thermodynamically free iodine passes by dispersion to the other side of the solid barrier until an equilibrium of thermodynamically free iodine vapour pressure is reached across the barrier. In a preferred embodiment of the invention the , degree to which the thermodynamically free iodine disperses to the other side of the iodine solving solid barrier may be controlled by means which reduce the vapour pressure of thermodynamically free iodine such as the variation of …
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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 August 20, 1990 and granted January 11, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended August 20, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 20, 2012.
- 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.