Microwave oven heating element having broken loops
CA 2250434 C · Owner: Graphic Packaging International, Inc. · Inventors: Lai, Lawrence; Zeng, Neilson
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A microwave energy heating element (37) has a plurality of spaced microwave components generally arranged in a closed loop pattern. Each of the microwave components, (42, 44) has a non-resonant length. When the heating element (37) is in a loaded condition, with a load juxtaposed thereto for capacitively coupling the microwave components (42, 44), together, the microwave components (42 44) cooperatively redistribute , impinging microwave energy. When the heating element (37) is in an unloaded condition the, microwave components (42, 44) act independently remaining generally inert to , impinging microwave energy. 16
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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 January 29, 1998 and granted November 26, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended January 29, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 29, 2020.
- 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.