Appliance ac power control apparatus
CA 2229071 C · Owner: Johnson Controls, Inc. · Inventors: Divjak, August A.; Deboer, David P.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An apparatus (90) for controlling an electrical appliance coupled with an output terminal and configured to operate in response to an alternating input signal, such as input AC power. The apparatus comprises a reference signal generator (96) for receiving the input signal and generating a reference signal (either Vramp of Vcontrol) in response to the input signal and a , control circuit (104) for controlling connection of the input signal to the output terminal in response to the reference signal and to a user-defined setpoint signal.
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 August 9, 1996 and granted June 13, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended August 9, 2016.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 9, 2018.
- 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.