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Expired Canadian patentCanada

Single beam full color electrophotography

CA 1294315 C · Owner: Zwadlo, Gregory L. · Inventors: Kidnie, Kevin M.; Zwadlo, Gregory L.

CIPO record

Overview

Drawings and full text

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

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Abstract From the Canadian patent

This application discloses a method of making high quality color prints by electrophotography. The prints are particularly suited to color proofing. A single photoconductive drum is used together with means to electrostatically charge, laser-scan expose, and toner develop during one rotation. In successive rotations different colored images corresponding to color separation images are assembled in register on the drum. This assembled color image is transferred to a receptor sheet in a final rotation of the drum.

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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 14, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended January 14, 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.
FiledMarch 17, 1988
GrantedJanuary 14, 1992
Term endedJanuary 14, 2009
Patent numberCA 1294315 C
Classification (IPC)G03G15/01 +2 more

Timeline

Timeline From CIPO dates

1989199219951998200120042007Application filedMarch 17, 1988Patent grantedJan 14, 1992Term endedJan 14, 2009

Sources & verification

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