Diagnostic system for a fuel-fired water heater
CA 2272034 C · Owner: Hall, Jacob H. · Inventors: Henderson, David L.; Hall, Jacob H.; Leep, Jeffrey A.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A fuel-fired water heater has a series of control and operating components which with electrical power being supplied to the water heater circuitry via a power switch are electrically actuatable in a predetermined sequence to supply combustion heat to water contained in a tank portion of the water heater to return the temperature of the water to a heated setpoint temperature in response to the water temperature falling below such setpoint temperature. LED diagnostic indicating lights are wired into the water heater circuitry in a manner such that each indicating light is associated with a different one of the electrically coupled components. As the components are sequentially actuated …
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 May 14, 1999 and granted June 27, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended May 14, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 14, 2021.
- 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.