The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 15, 1992
Filed:
Sep. 06, 1991
Don B Jugle, Penfield, NY (US);
Michael L Grande, Palmyra, NY (US);
Edward J Gutman, Webster, NY (US);
Douglas A Lundy, Webster, NY (US);
Charles D Zimmer, Ontario, NY (US);
Xerox Corporation, Stamford, CT (US);
Abstract
Disclosed is a developer composition which consists essentially of a toner consisting essentially of a resin, a colorant, and colloidal silica external additive particles and a carrier consisting essentially of a core, an optional coating on the core, and an external additive selected from the group consisting of metal salts of fatty acids, linear polymeric alcohols comprising a fully saturated hydrocarbon backbone with at least about 80 percent of the polymeric chains terminated at one chain end with a hydroxyl group, polyethylene waxes with a molecular weight of from about 300 to about 2,000 polypropylene waxes with a molecular weight of from about 300 to about 3,000, and mixtures thereof. Also disclosed are processes for using the aforementioned developer in a tri-level development process.