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Expired Canadian patentCanada

Modulation electrodes having improved corrosion resistance

CA 1288278 C · Owner: Xerox Corporation · Inventors: Sang, Henry W. Jr.; Sheridon, Nicholas K.

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 marking array for use in an ionographic printer in which the transport fluid entrained ions presents a highly corrosive atmosphere to the modulation electrodes. Marking electrodes formed of an alloy of aluminum and copper wherein the copper is in the range of 0.5 to 4% exhibit a remarkably extended lifetime over unalloyed aluminum electrodes.

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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 3, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended September 3, 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.
FiledMarch 4, 1988
GrantedSeptember 3, 1991
Term endedSeptember 3, 2008
Patent numberCA 1288278 C
Classification (IPC)B41J2/38 +2 more

Timeline

Timeline From CIPO dates

1989199119931995199719992001200320052007Application filedMarch 4, 1988Patent grantedSep 3, 1991Term endedSep 3, 2008

Sources & verification

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