Oil consumption meter
CA 2089328 A1 · Owner: Zegray, John · Inventors: Zegray, John
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An oil consumption meter for an oil-burning furnace with a burner motor, comprises a user accessible memory for storing the rate of oil consumption of the furnace a sensor, means for generating a signal when the burner motor is in operation, a processor responsive to the sensor signal to calculate the oil consumption from the time said burner motor is in operation, and a display for displaying the oil consumption as calculated by the processor. The meter can be easily retrofitted by the homeowner without the need to be plumbed or wired into the furnace circuitry.
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 February 11, 1993. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended February 11, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 11, 2015.
- 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.