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Expired Canadian patentCanada

Antistatic and electrically conducting polymers and moulding materials

CA 1314548 C · Owner: Ciba-Geigy Ag · Inventors: Mayer, Carl W.; Hilti, Bruno; Finter, Jurgen

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Abstract From the Canadian patent

Antistatic and electrically conducting polymers and moulding materials Abstract, As a result of the action of electron acceptors for example chlorine, bromine and/or iodine on compositions containing a linear, branched or structurally crosslinked polymer and an unsubstituted or substituted tetrathionaphthalene, tetraselenonaphthalene tetratellurona-, phthalene, tetrathiotetracene tetraselenotetracene or tetratelluro-, tetracene electrical conductivity is imparted to the compositions through the formation of charge-transfer complexes. These compositions are suitable for the production of mouldings filaments, fibres, coatings and composite materials which have an antistatic finish or are …

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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 March 16, 1993. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended March 16, 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.
FiledMarch 31, 1988
GrantedMarch 16, 1993
Term endedMarch 16, 2010
Patent numberCA 1314548 C
Classification (IPC)C07D495/00 +2 more

Timeline

Timeline From CIPO dates

19891992199519982001200420072010Application filedMarch 31, 1988Patent grantedMarch 16, 1993Term endedMarch 16, 2010

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