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:
Jan. 30, 2007
Filed:
Apr. 30, 2004
Hichang Yoon, Fairport, NY (US);
Bret Martin Johnston, Dansville, NY (US);
Dinesh Tyagi, Fairport, NY (US);
Michael Thomas Regan, Fairport, NY (US);
Hichang Yoon, Fairport, NY (US);
Bret Martin Johnston, Dansville, NY (US);
Dinesh Tyagi, Fairport, NY (US);
Michael Thomas Regan, Fairport, NY (US);
Eastman Kodak Company, Rochester, NY (US);
Abstract
A process for the preparation of colored polymeric toner particles includes: forming an organic phase by dissolving an organic polymer and, optionally, one or more additives in a water-immiscible organic solvent; forming a dispersion by combining the organic phase with an aqueous phase comprising a particulate stabilizer, a colorant, and, optionally, a promoter, with the proviso that when the colorant is carbon black, it is an acidic carbon black having a pH less than 7; homogenizing the dispersion to form droplets containing the organic solvent, organic polymer, and colorant; removing the organic solvent from the droplets to form colored polymeric toner particles; and separating and drying the toner particles.