Automatic thawing device of microwave oven and control method thereof
CA 2115406 C · Owner: Chai, Eun Sik · Inventors: Gong, Chun Sig; Chai, Eun Sik; Kim, Seog Tae
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An automatic thawing device of a microwave oven and a method for control thereof. A turntable is rotatably placed in a cooking chamber. A gas sensor is placed about an exhaust port of the oven and senses amount of gas or vapor exhausted from the cooking chamber through the exhaust port during a thawing operation, and outputs a gas amount signal to a microprocessor. The microprocessor calculates a thawing time by operation of the output signal of the gas sensor and outputting a thawing control signal for driving the microwave oven. An output drive unit controls output level of electromagnetic wave of high frequency of a magnetron in accordance with the thawing control signal of the …
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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
- Filed February 10, 1994 and granted April 8, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended February 10, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 10, 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
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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.