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Expired Canadian patentCanada

Corona generating device

CA 1232007 A · Owner: Xerox Corporation · Inventors: Driessen, Wilhelmus G.M.

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 corona generating device for producing uniform charge along the length of the generating device is described which comprises a plurality of separate parallel coronode wires supported between insulating end block assemblies with the coronode wires being closely spaced relative to the adjacent wire such that when energized each wire is placed within the, electrostatic fringe field of the adjacent wire. In a preferred embodiment the device comprises a pair of parallel coronode wires formed from a single Ushaped wire with a closed end portion wrapped around an arcuate insulating end post in a first end block assembly and an arcuate insulating end post in, the second end block assembly around …

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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 January 26, 1988. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended January 26, 2005.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledOctober 19, 1984
GrantedJanuary 26, 1988
Term endedJanuary 26, 2005
Patent numberCA 1232007 A
Classification (IPC)H01T19/00 +1 more

Timeline

Timeline From CIPO dates

1985198819911994199720002003Application filedOct 19, 1984Patent grantedJan 26, 1988Term endedJan 26, 2005

Sources & verification

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