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Expired Canadian patentCanada

Production of an electrically conductive surface layer on moldings consisting of plastics

CA 1307429 C · Owner: Aumueller, Alexander · Inventors: Neumann, Peter; Lindenschmidt, Gerhard; Aumueller, Alexander

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Abstract From the Canadian patent

O.Z. 0050/38490, Abstract of the Disclosure: An electrically conductive surface layer is produced on moldings consisting of plastics which are soluble or swellable in organic solvents, the conductivity of the said layer being based on a system, incorporated therein, of, - organic electron acceptors (I) on the one hand and, - organic electron donors (II), iodides (III) or a mixture of (II) and (III) as electron donors on the other, hand, by a process in which the moldings are treated with organic solutions of these components. The products have a surface resistance of from 10 to 102 ohm and have the advantage that the remaining properties of the moldings are virtually unaffected by the …

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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 15, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended September 15, 2009.
  • 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 3, 1987
GrantedSeptember 15, 1992
Term endedSeptember 15, 2009
Patent numberCA 1307429 C
Classification (IPC)B05D5/12 +1 more

Timeline

Timeline From CIPO dates

19881991199419972000200320062009Application filedJune 3, 1987Patent grantedSep 15, 1992Term endedSep 15, 2009

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