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Expired Canadian patentCanada

Conducting polymer films, methods of manufacture and applications therefor

CA 1331235 C · Owner: Humphrey, Brian D. · Inventors: Humphrey, Brian D.; Kasner, Marc L.; Isidor, John L.

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Abstract From the Canadian patent

Conducting polymer films comprising a polymer matrix with intercalated, bonded conducting polymers prepared from a, polysaccharide matrix and the monomer of conducting polymer, are useful as anti-static materials optical, filters, solid electrolytes, electrodes and electrochemical sensors. The conducting polymers are polyheterocycles such as polyaniline, polythiophene and their derivatives.

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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 August 2, 1994. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended August 2, 2011.
  • 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 2, 1988
GrantedAugust 2, 1994
Term endedAugust 2, 2011
Patent numberCA 1331235 C
Classification (IPC)H01B1/12 +2 more

Timeline

Timeline From CIPO dates

19891992199519982001200420072010Application filedJune 2, 1988Patent grantedAug 2, 1994Term endedAug 2, 2011

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