Ozone generating apparatus
CA 2298960 C · Owner: Mukai, Masahiro · Inventors: Yagi, Shigenori; Yoshizawa, Kenji; Tabata, Youichiro
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method of generating ozone that includes the steps of supplying an oxygen-containing gas to a discharge space to maintain a gas pressure in the discharge space of at least one atmosphere and applying a voltage across two mutually opposed electrodes to generate a voltage discharge in the discharge space. This is accomplished by supplying an electrical energy per gas molecule of at least 50 watt minutes per liter of the gas at standard temperature and pressure. The discharge space has a discharge gap length of not more than 0.6 mm and the product of the gas pressure in the discharge space and the discharge gap length is not more than 78 Torr~cm. This produces ozone in a concentration …
Read the whole patent
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 21, 1995 and granted August 21, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 21, 2015.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 21, 2017.
- 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.