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Expired Canadian patentCanada

Photoresponsive imaging members with high molecular weight polysilylenehole transporting compositions

CA 1298022 C · Owner: Badesha, Santokh S. · Inventors: Roberts, Frederick J.. Jr.; Weagley, Ronald J.; Stolka, Milan

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Overview

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Abstract From the Canadian patent

Photoresponsive imaging members comprised of hole transporting polysilylene compounds with a single peak molecular weight distribution, and wherein the polysilylenes selected have excluded therefrom molecular weight fractions of less than 50,000 thereby enabling for example, the resulting imaging members to be substantially resistant to liquid ink developer compositions for an extended number of imaging cycles when these members are incorporated into electrostatographic imaging devices.

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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 24, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended March 24, 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.
FiledFebruary 12, 1988
GrantedMarch 24, 1992
Term endedMarch 24, 2009
Patent numberCA 1298022 C
Classification (IPC)G03G5/07 +1 more

Timeline

Timeline From CIPO dates

1989199219951998200120042007Application filedFeb 12, 1988Patent grantedMarch 24, 1992Term endedMarch 24, 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.