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Expired Canadian patentCanada

Powder coating process for seamless substrates

CA 1313477 C · Owner: Xerox Corporation · Inventors: Nichol-Landry, Deborah J.; Loutfy, Rafik Omar; Mammino, Joseph

CIPO record

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Its claims, description and drawings are in the Canadian Patents Database.

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Abstract From the Canadian patent

A process for the fabrication of seamless substrates which comprises (1) providing a substrate with a release coating composition thereover; (2) depositing thereon by electrostatic powder spraying a polymer; (3) melting the polymer blend; and (4) subsequently permitting the melted blend to cool. Thereafter, layered photoconductive imaging members can be prepared by the application for example, of a ground, plane, a photogenerating layer and a charge transport layer.

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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 9, 1993. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended February 9, 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 5, 1987
GrantedFebruary 9, 1993
Term endedFebruary 9, 2010
Patent numberCA 1313477 C
Classification (IPC)G03G5/05 +2 more

Timeline

Timeline From CIPO dates

19881991199419972000200320062009Application filedMarch 5, 1987Patent grantedFeb 9, 1993Term endedFeb 9, 2010

Sources & verification

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