Ignition system using multiple gated switches with variable discharge energy levels and rates
CA 2128036 C · Owner: Simmonds Precision Engine Systems, Inc. · Inventors: Killean, John Edward; Bonavia, Howard Vincent
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An ignition system for a gas turbine engine includes a plurality of igniters an energy storage capacitance, a charging circuit for charging the capacitance a plurality of gated switches, with at least one switch connected between each igniter and the capacitance and control means for discharging respective amounts of energy from the capacitance to each respective igniter at respective spark rates.
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 July 14, 1994 and granted November 4, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended July 14, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 14, 2016.
- 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.