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Expired Canadian patentCanada

Electrically conductive material and a process for the preparation of sameand secondary battery using the electrically conductive material

CA 1288809 C · Owner: Mitsubishi Chemical Industries Limited · Inventors: Furukawa, Nobuhiro; Suzuki, Tetsumi; Nishio, Koji

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Abstract From the Canadian patent

New electrically conductive material suitable particularly for a secondary battery and a process for preparing the electrically conductive material are provided. The process for the preparation of the electrically conductive material comprises the steps of reacting a compound having conjugated double bonds with an oxidizing agent wherein the oxidizing agent comprises a cupric compound and a nitrile compound. The electrically conductive material comprises grainy polypyrrole obtained by reacting a pyrrole compound with an oxidizing agent which is constituted by primary particles having an average particle size of 0.01 to 0.4 µm and has a press molding density of 1 to 1.6 g/cm3.

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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 September 10, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended September 10, 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.
FiledSeptember 11, 1987
GrantedSeptember 10, 1991
Term endedSeptember 10, 2008
Patent numberCA 1288809 C
Classification (IPC)C08G61/00 +2 more

Timeline

Timeline From CIPO dates

1988199119941997200020032006Application filedSep 11, 1987Patent grantedSep 10, 1991Term endedSep 10, 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.