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:
Aug. 25, 1998
Filed:
Jun. 03, 1997
David Brian Bilbrey, Westminster, CO (US);
Rick Owen Jones, Berthoud, CO (US);
George Pharris Marshall, Boulder, CO (US);
Michael Gordon Miller, Longmont, CO (US);
James Craig Minor, Longmont, CO (US);
Lexmark International, Inc., Lexington, KY (US);
Abstract
A high speed toner comprising a body of hybrid resin which is about 92 percent by weight polyester and 8 percent by weight polystyrene. Blended in the resin is a charge control agent, a pigment, and about 10 percent by weight of the toner of fumed aluminum oxide. Where the pigments are color-subtractive the charge control agent is a copolymer of styrene and 2-acrylamido-2-methylpropane sulfonic acid. The toner is mixed with a carrier of ferrite particles having a thick silicone coating to remain through the long life of the toner.