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Expired Canadian patentCanada

Overcoated inorganic layered photoresponsive device and process of preparation

CA 1162432 A · Owner: Xerox Corporation · Inventors: Pinsler, Heinz W.; Brown, George A.; Relyea, Lloyd A.

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Abstract From the Canadian patent

This invention is generally directed to inorganic overcoated photoresponsive devices comprised of a substrate a layer of hole injecting, material capable of injecting holes into a layer on its surface this layer, being comprised of trigonal selenium a hole transport layer in operative, contact with the hole injecting layer this layer being comprised of a halogen doped selenium arsenic alloy, wherein the percentage by weight of selenium present is from about 99.5 percent to about 99.9 percent the percentage, by weight of arsenic present is from about 0.1 percent to about 0.5 percent and the halogen is present in an amount 0.1 from about 10 parts per million to about 200 parts per million; a …

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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 February 21, 1984. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended February 21, 2001.
  • 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 16, 1981
GrantedFebruary 21, 1984
Term endedFebruary 21, 2001
Patent numberCA 1162432 A
Classification (IPC)G03G5/00 +2 more

Timeline

Timeline From CIPO dates

1982198419861988199019921994199619982000Application filedFeb 16, 1981Patent grantedFeb 21, 1984Term endedFeb 21, 2001

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