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Expired Canadian patentCanada

Additive composition for increasing the conductivity of an organic polymer, an active hydrogen-containing composition containing the additive composition, and an organic polymer composition containing the additive composition

CA 1284243 C · Owner: Knobel, Thomas M. · Inventors: Walker, Mary A.; Kennedy, Earl E.; Knobel, Thomas M.

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Abstract From the Canadian patent

This invention is directed to an additive composition for increasing the conductivity of an organic polymer, and to an active hydrogen-containing composition and an organic polymer composition containing the additive composition. This additive composition is characterized by comprising (a) a nonvolatile ionizable metal salt and (b) an enhancer which is a salt or ester of a carboxylic acid in which said metal salt is soluble, which enhancer increases the conductivity of an organic polymer containing said ionizable salt, but which does not itself substantially increase the conductivity of said organic polymer in the substantial absence of said ionizable salt and wherein from 1 to 25 moles of …

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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 May 14, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 14, 2008.
  • 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 26, 1985
GrantedMay 14, 1991
Term endedMay 14, 2008
Patent numberCA 1284243 C
Classification (IPC)C08K13/02 +2 more

Timeline

Timeline From CIPO dates

19861989199219951998200120042007Application filedAug 26, 1985Patent grantedMay 14, 1991Term endedMay 14, 2008

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