High frequency heating apparatus and electromagnetic wave detector for use in high frequency heating apparatus
CA 2046775 C · Owner: Yamaguchi, Kimiaki · Inventors: Sakai, Shinichi; Yota, Masato; Moriyama, Satomi
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A high frequency heating apparatus and an electromagnetic wave detector for use in the apparatus are so arranged as to estimate the condition of a food article placed in a heating chamber by detection of microwaves within the chamber. By controlling the position of an antenna and, employing a method of processing signals of the microwaves detected, it becomes possible to achieve stable detection with high reliability.
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 11, 1991 and granted February 8, 1994. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended July 11, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 11, 2013.
- 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.