Air conditioning method and apparatus
CA 2030141 C · Owner: Yamauchi, Shiro · Inventors: Hanada, Takeaki; Yamauchi, Shiro
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An air conditioning method and apparatus for electro-chemically regulating a humidity and an oxygen-concentration within a case by the use of an ion exchanger polymer electrolyte. Where the humidity and the oxygen-concentration within the case are reduced, a cell comprising an anode a, cathode and an anion exchanger polymer electrolyte sandwiched between both the electrodes is arranged so that a surface of the anode is in contact with an atmospheric air outside the case and a surface of the cathode is in contact with an ambient atmosphere inside the case and DC voltage is applied between both the electrodes. On the other hand where the humidity and the oxygen-concentration within the case …
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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 November 16, 1990 and granted August 18, 1998. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended November 16, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 16, 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.