Method and apparatus for removing toxic substances from waste marine products
CA 2285740 A1 · Owner: Ichikawa, Hiroyuki · Inventors: Ichikawa, Hiroyuki; Asakura, Hiroshi; Kojima, Masayuki
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
In an electrolytic bath, an extraction part extracts heavy metal in the internal organs of scallops into an acid solution. A direct current voltage is applied between electrodes, which are provided in the acid solution to , deposit, the heavy metal in the acid solution on the electrodes. If the deposit efficiency, deteriorates, the polarity applied between the electrodes is reversed from the polarity in the deposition of the heavy metal in a neutral or alkali electrolytic, solution. Consequently, the heavy metal is removed from the electrodes. Since arsenic is dissolved in the acid solution an alkali liquid and a , flocculant, are added to the acid solution to sediment arsenic.
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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 October 8, 1999. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended October 8, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 8, 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.