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Expired Canadian patentCanada

Susceptors having disrupted regions for differential heating in a microwave oven

CA 1320541 C · Owner: Rosenwald, Diane R. · Inventors: Kemske, Jonathan D.; Consaul, James R.; Rosenwald, Diane R.

CIPO record

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Its claims, description and drawings are in the Canadian Patents Database.

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Abstract From the Canadian patent

A packaging system is disclosed which includes a susceptor heating means having selective responsiveness to microwave radiation. The susceptor surface has a plurality of regions, where at least one region has an altered responsiveness to microwave radiation which is achieved by disruptions in the susceptor surface. A method for making regions of a susceptor selectively responsive to microwave heating by disrupting the continuity of the metallized film of the susceptor is also disclosed.

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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

  • Granted July 20, 1993. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended July 20, 2010.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledMay 23, 1989
GrantedJuly 20, 1993
Term endedJuly 20, 2010
Patent numberCA 1320541 C
Classification (IPC)H05B6/64 +1 more

Timeline

Timeline From CIPO dates

1990199319961999200220052008Application filedMay 23, 1989Patent grantedJuly 20, 1993Term endedJuly 20, 2010

Sources & verification

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