Process for achieving consistent high quality images with magnetic developer composition
CA 1255950 A · Owner: Xerox Corporation · Inventors: Knapp, John F.; Gruber, Robert J.; Floyd, Lawrence, Jr.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A process for generating consistent high quality images for extended periods, consisting essentially of (1) providing a xerographic imaging,or printing apparatus; (2) adding thereto a stable two component developer composition comprised of resin particles first pigment particles, second, magnetite pigment particles which are present in a greater amount than the first pigment particles, and blended flow additive particles; and carrier particles consisting of a ferrite core or a steel core and a coating thereover selected from the group consisting of terpolymers of styrene methacrylate, and triethoxysilane; and polymethacrylate which coating has incorporated, therein conductive particles; (3) …
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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 June 20, 1989. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 20, 2006.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
Timeline From CIPO dates
Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.