Nitrogen oxide detecting sensor and method of manufacturing the same
CA 2127016 C · Owner: Tanaka, Shoji · Inventors: Ipponmatsu, Masamichi; Takano, Satoshi; Kudo, Shuzo
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A nitrogen oxide detecting sensor includes a gas detecting portion and electrodes electrically connected to the gas detecting portion. The gas detecting portion is composed mainly of an oxide compound having electric conductivity or semiconductivity. The oxide compound has a crystal structure of 2212 phase and expressed generally as: Bi2 Sr2 (Ca~-X Y X ) Cu2 O8 ~ .delta. (where X is more than 0 but not more than 1, excluding 1 .delta. is more than 0 but less than 1 including 1).
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 June 29, 1994 and granted November 23, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended June 29, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 29, 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.