Fuel measurement technique
CA 2005385 A1 · Owner: Hughes Aircraft Company · Inventors: Steinhauer, Robert A.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An improved technique for measuring the liquid remaining in a satellite is disclosed. The method of the invention includes the steps of a) coupling a known amount of thermal energy into a tank 12; b) measuring the time rate of change of the temperature dT/dt of the liquid 14 in response to the known amount of thermal energy; and c) calculating the mass m of the liquid 14 in the tank 12 as a function of the measured time rate of change of temperature of the liquid 14. In a specific embodiment, the method of the invention includes the step of compensating for the mass of the tank 12.
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 December 13, 1989. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended December 13, 2009.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 13, 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.