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Expired Canadian patentCanada

Multiple color liquid developer electrophotographic copying machine and liquid distribution system therefor

CA 1232315 A · Owner: Savin Corporation · Inventors: Rosen, Josef; Landa, Benzion

CIPO record

Overview

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

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Abstract From the Canadian patent

An electrophotographic copier for selectively printing in one of a number of different colors in which development takes place at a common station around the periphery of a photoconductive drum to which station a distributor system selectively feeds liquid from one of a number of supply containers and from which the liquid is returned to the container from whence it came. Our machine flushes the common portion of the liquid circulating system each time a change in color is made. The processing liquid tanks of our machine are provided with an arrangement for inhibiting settling of toner particles in the tanks.

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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 2, 1988. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended February 2, 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.
FiledJune 7, 1985
GrantedFebruary 2, 1988
Term endedFebruary 2, 2005
Patent numberCA 1232315 A
Classification (IPC)G03G15/01 +1 more

Timeline

Timeline From CIPO dates

1986198819901992199419961998200020022004Application filedJune 7, 1985Patent grantedFeb 2, 1988Term endedFeb 2, 2005

Sources & verification

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