Microwave oven timer and control circuit
CA 1063181 A · Owner: Essex Group, Inc. · Inventors: Bennett, David F.; Fosnough, Robert D.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A control system for a microwave oven includes a programmable digital logic control circuit which enables a user to program information into the digital logic control circuit. The digital logic control circuit of the present invention allows a user to program information into the control relating to the amount of time the magnetron tube is to be energized. The control also allows the user to select the power level or duty factor at which the magnetron is energized from three different levels thus providing a choice, to the user as to whether the magnetron is to be operated in a defrost mode a slow cook mode or a cook mode. The control of the present invention allows the oven to be operated …
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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
- Granted September 25, 1979. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended September 25, 1996.
- 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.