Gas sensor and method of manufacturing the same
CA 1292298 C · Owner: Osaka Gas Co. Ltd. · Inventors: Matsuzaka, Takashi; Kuroki, Katsuyuki; Yakushizi, Shingo
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Disclosed is a gas sensor particularly, an inflammable, gas sensor for detecting an inflammable gas such as leaked, natural gas. The sensor comprises an n-type metal oxide semiconductor film, such as SnO2 film, whose resistivity varies responsive to the detection of the inflammable gas. The semiconductor film is covered on its surface by an oxide film insulator made of an oxide such as SiO2, MnO, MnO2 and V2O5. While the inflammable gas which may contain ethanol passes through the oxide film insulator, the concentration of the more reactive ethanol decreases and as a result, the sensitivity to methane and hydrogen is improved. Also disclosed is a preferred production method of the sensor. …
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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
- Granted November 19, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended November 19, 2008.
- 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.