Method of distributing heat in food containers adapted for microwave cooking and novel container structure
CA 2115734 C · Owner: Graphic Packaging International, Inc. · Inventors: Maheux, David; Tomich, Robert
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An improved technique for uniformly distributing crisping or browning heat supplementation in disposable paper food carton or containers and the like used for microwave cooking, in which metallized susceptor film is employed mounted to butintermediately spaced from the adjacent inner wall of the container to define and seal an air pocket which, in heating, improves the uniformity of the browning result through conviction into air pocket and responsive flexing of the film.
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 February 15, 1994 and granted October 20, 1998. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended February 15, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 15, 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
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.