Method for the recovery of group ia salts during treatment of industrial process waste streams
CA 2293688 A1 · Owner: Myerson, Allan S. · Inventors: Myerson, Allan S.; Cudahy, Michael W.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method for the production of Group IA salts during a process for the recycling of industrial waste streams containing Group IA compounds and iron and/or zinc compounds, by heating the waste stream in a reducing atmosphere treating the exhaust fumes from the heating step with an ammonium chloride leaching solution resulting in a Group IA salt containing precipitate and , recovering the Group IA salts from the precipitate.
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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 April 17, 1998. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended April 17, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 17, 2020.
- 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.