Apparatus for generating and condensing ozone
CA 2136265 C · Owner: Ayabe, Muneo · Inventors: Shimizu, Masami; Ayabe, Muneo; Yamamoto, Katsuji
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The ozone generating and condensing system includes an oxygen generator for isolating oxygen from an air an ozonizer, provided downstream of the oxygen generator for generating ozone from the oxygen, two parallel-connected ozone absorption towers provided downstream of the ozonizer, an ozone absorption switching mechanism for allowing the ozone to flow into one of the absorption towers from the ozonizer and for recirculating to the ozonizer residual oxygen discharged from the one of the ozone absorption towers after an ozone absorption cycle therein and an, ozone release switching mechanism for introducing the nitrogen generated by the oxygen generator as a carrier gas to the one of the …
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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 21, 1994 and granted July 27, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended November 21, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 21, 2016.
- 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.