Improved flame sensor for a burner
CA 2483367 C · Owner: Kiarostami, Nader · Inventors: Kiarostami, Nader
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A flame sensor circuit is used to sense the presence or absence of a flame an a burner. A first sensor generates a first intensity signal which is proportional to the light intensity of the flame a.n the burner. A second sensor generates a second signal produced by the flicker of the flame. The presence of both the first and second signals is sensed and if both are present an output signal is generated to indicate the presence of the flame in the burner.
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 September 30, 2004 and granted June 19, 2012. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended September 30, 2024.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 30, 2026.
- 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.