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:
Sep. 24, 2002
Filed:
Jun. 22, 2001
Allan K. Chen, Oakville, CA;
Tie Hwee Ng, Mississauga, CA;
Arthur Helbrecht, Oakville, CA;
Kimberly D. Nosella, Mississauga, CA;
Danielle C. Boils-Boissier, Mississauga, CA;
Paul J. Gerroir, Oakville, CA;
Rosa M. Duque, Brampton, CA;
Xerox Corporation, Stamford, CT (US);
Abstract
A process for making silica-containing latex particles involves polymerizing monomer in an emulsion comprising the monomer, water, silica particles, and optionally at least one surfactant, by adding at least one free radical initiator to the emulsion to form the silica-containing latex particles. In a preferred method, semicontinuous polymerization employing a seed latex is used to form the latex resin. The process achieves a silica-containing latex in which the silica is chemically incorporated therein that is ideally suited for use in the manufacture of toner and developer for xerographic use.