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Expired Canadian patentCanada

Thermal imaging device

CA 1323903 C · Owner: Voles, Roger · Inventors: Voles, Roger

CIPO record

Overview

Drawings and full text

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

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Abstract From the Canadian patent

A pyroelectric film has a pattern of interconnected electrodes formed on one major surface and a pattern of discrete, electrodes and electrically conductive patches formed on the other major surface. The film 21 is supported by pillars connected to the patches, the pillars also producing a path for electrical signals between the patches and a signal processing means. Each discrete electrode is connected to a respective patch by a respective strip of electrically conductive material.

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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 November 2, 1993. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended November 2, 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 31, 1989
GrantedNovember 2, 1993
Term endedNovember 2, 2010
Patent numberCA 1323903 C
Classification (IPC)H01L27/14 +2 more

Timeline

Timeline From CIPO dates

1990199319961999200220052008Application filedMay 31, 1989Patent grantedNov 2, 1993Term endedNov 2, 2010

Sources & verification

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