Ozonizer
CA 2213938 C · Owner: Shinagawa, Misato · Inventors: Shinagawa, Misato; Nishimura, Yoshiyuki; Tanioka, Takashi
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An ozonizer in which a pair of plate-like electrode plates are arranged opposite to each other so as to form a discharge space therebetween, and ceramic dielectric layers are arranged on the surface on the side of the discharge spaces of said electrode plates, wherein a plate-like anode 4 is arranged between the dielectrics 31 and 32, extreme ends 41 and 42 having sharp extreme ends of a number of protrusions are formed on both surfaces of the anode 4, the anode 4 is arranged between the dielectrics 41 and 42 in a state where the extreme ends 41 and 42 are in contact with the surfaces of the dielectrics 31 and 32 on both sides the anode 4 is formed with a number of through-holes extending …
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 August 26, 1997 and granted August 22, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended August 26, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 26, 2019.
- 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.