Control system for air cleaner
CA 1289224 C · Owner: Katsuyuki, Tanaka · Inventors: Katsuyuki, Tanaka; Naoyuki, Oie; Shinichi, Matsumoto
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A system for controlling an air cleaner having high ability to remove smoke but low ability to remove gas with use of a gas sensor having higher sensitivity to gas than to smoke. The air cleaner is brought into operation when the gas sensor detects the gas released with the occurrence of smoke. The progress of removal of smoke is detected from the saturation of the gas sensor output, whereupon the cleaner is brought out of operation. Preferably, the air cleaner is held in operation for a predetermined period of time after the detection of the saturation to fully remove the smoke.
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
- Granted September 17, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended September 17, 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.