Ferrite compositions for use in a microwave oven
CA 2189727 C · Owner: Ceramic Powders, Inc. · Inventors: Tenzer, Rudolf K.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A ferrite composition is created by adding a high Curie temperature ferrite, such as lithium ferrite to a soft magnetic ferrite, such as magnesium manganese zinc ferrite. The composition is used in a microwave oven dish or laminate wrap to crisp or brown food by maintaining the food at a desired temperature during microwave operation. The high Curie temperature ferrite is preferably selected from the group consisting of lithium ferrite, nickel ferrite, copper ferrite magnesium ferrite, strontium ferrite, barium ferrite manganese ferrite, strontium zinc ferrite barium zinc, ferrite, and mixtures thereof. Additionally the, preferred process of making the new ferrite composition for use in …
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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 November 6, 1996 and granted August 17, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended November 6, 2016.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 6, 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
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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.