US Patent 7419754 Particle having conductive polymer surface additive

Patent 7419754 was granted and assigned to Xerox on September, 2008 by the United States Patent and Trademark Office.

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Is a

Patent

Patent attributes

Current Assignee

Xerox

Patent Jurisdiction

United States Patent and Trademark Office

Patent Number

7419754

Date of Patent

September 2, 2008

Patent Application Number

11094412

Date Filed

March 31, 2005

Patent Primary Examiner

‌

Hoa V Le

Patent abstract

Particles, preferably toner particles comprised of at least binder and colorant, are described that include a doped conductive polymer material as a surface additive on the external surface of the particle. The presence of the doped external conductive polymer material enables the particles to retain a substantially uniform charge distribution over the surface of the particles over time, and also enables appropriate control over the triboelectric (tribo) properties of a developer. Also described are developers comprised of such particles in admixture with carrier particles, and methods of making the particles and developers.