Systems and methods for controlling gas flow
CA 2461782 C · Owner: Watson, Eric Kent · Inventors: Watson, Eric Kent; Little, Derrick Douglas
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method for controlling a motion of a gas valve in a gas feed line coupling a supply device to a burner is provided. The method includes receiving a signal representative of a user-selected desired level of heat output of the burner translating the received signal to a first current signal measuring a second current signal in a conducting medium that is operatively coupled with the valve deriving a third current signal from the first and second current signals and providing the third current signal to the conducting medium to control the motion of the valve.
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 March 25, 2004 and granted September 17, 2013. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 25, 2024.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 25, 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.