Automatic control systems for aircraft auxiliary power units, and associated methods
CA 2856547 C · Owner: The Boeing Company · Inventors: Campbell, Thomas A.; Nguyen, Phuong H.; Sikora, Joseph A.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An aircraft power system comprises an aircraft auxiliary power unit and a controller coupled to the aircraft auxiliary power unit the controller being configured to automatically start the auxiliary power unit in flight when power supplied or expected to be supplied to an aircraft subsystem to which the auxiliary power unit is coupleable has a nonzero value at or below a threshold value.
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 September 14, 2005 and granted October 18, 2016. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended September 14, 2025.
- 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.