Fuel gauge for fuel cartridges
CA 2544610 C · Owner: Loonis, Charles · Inventors: Fairbanks, Floyd; Loonis, Charles; Curello, Andrew J.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A fuel supply (40) for a fuel cell comprises a fuel gauge (78 80) for , determining the remaining amount of fuel. The fuel gauge (78, 80) is coupled to an electrical circuit and has a property that is readable by the electrical circuit that relates to the amount of fuel remaining in the fuel supply (40). The property can include a measure of electrical capacitance magnetic , field strength, semi-conducting resistance be-metal resistance, and , oscillating magnetic field strength. The fuel gauge (78 80) is , functional at any orientation of the fuel supply (40).
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 November 24, 2004 and granted July 30, 2013. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended November 24, 2024.
- Certificates of supplementary protection extend only drug patents, and it isn't classified as one.
- 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.