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Expired Canadian patentCanada

Conductive pyrolyzed dielectrics and articles made therefrom

CA 1269809 C · Owner: Parish, Darrell J. · Inventors: Eastman, Paul F.; Enouen, Susan W.; Parish, Darrell J.

CIPO record

Overview

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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 conductive dielectric structure is, disclosed wherein a thermoplastic matrix has a multitude of electrically conductive channels through its thickness and, optionally, at least one electrically conductive surface which, along with protective and heat seal layers, can be formed into conductive belts.

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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 June 5, 1990. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 5, 2007.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledJune 17, 1986
GrantedJune 5, 1990
Term endedJune 5, 2007
Patent numberCA 1269809 C
Classification (IPC)B32B3/12 +2 more

Timeline

Timeline From CIPO dates

1987199019931996199920022005Application filedJune 17, 1986Patent grantedJune 5, 1990Term endedJune 5, 2007

Sources & verification

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