Fuel control system, throttle valve unit therefor and methods of making the same
CA 2000820 A1 · Owner: Rath, David J. · Inventors: Rath, David J.; Hutchison, Donald W.; Kimmel, Steven A.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
TITLE OF THE INVENTION:, FUEL CONTROL SYSTEM THROTTLE VALVE UNIT THEREFOR, AND METHODS OF MAKING THE SAME ABSTRACT OF THE DISCLOSURE:, A fuel control system throttle valve unit, therefor and methods of making the same are provided, the system comprising a burner a source, of fuel for the burner, and a throttle valve unit for interconnecting the source to the burner the, throttle valve unit having a movable valve member and a valve seat controlled by the valve member the, throttle valve unit having an electrically operated unit operatively associated with the valve member to control the position of the valve member relative to the valve seat so as to control the flame height at the burner, …
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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
- Filed October 16, 1989. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended October 16, 2009.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 16, 2011.
- 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.