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Expired Canadian patentCanada

Microwaveable laminate container

CA 2575996 C · Owner: Pactiv Corporation · Inventors: Bunds, Jim E.; Schiltz, David C.; Golden, Craig A.

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Abstract From the Canadian patent

Microwaveable container that provides for accelerated microwave cooking times and more uniform internal temperature distribution. The container is manufactured from a laminate structure the laminate structure including a , first layer of microwave-transparent material and a second layer of microwavereflective material. The second layer has at least one aperture defined therein, the at least one aperture having a width dimension W a length , dimension L, and a perimeter dimension P. The aperture is sized such that at least one of the width dimension W or length dimension L is sized about an energy maximum. Accordingly, the width and/or the length dimension is defined as within …

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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 August 5, 2005 and granted October 22, 2013. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended August 5, 2025.
  • Certificates of supplementary protection extend only drug patents, and it isn't classified as one.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledAugust 5, 2005
GrantedOctober 22, 2013
Term endedAugust 5, 2025
Patent numberCA 2575996 C
Classification (IPC)B65D81/34

Timeline

Timeline From CIPO dates

2006200820102012201420162018202020222024Application filedAug 5, 2005Patent grantedOct 22, 2013Term endedAug 5, 2025

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Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.