Granted Patent
Utility
US 6,458,501 · App. 09/409,690
Forming a toner using surfactant-free emulsion polymerization
Inventors:
Chieh-Min Cheng, Grazyna E. Kmiecik-Lawrynowicz, Allan K. Chen
Patented Case
View Patent ↗
Granted: Oct 1, 2002
Filed: Sep 30, 1999
Inventors
Chieh-Min Cheng
Grazyna E. Kmiecik-Lawrynowicz
Allan K. Chen
Assignee (at issue)
Xerox Corporation
This patent predates the USPTO's electronic file wrapper — prosecution documents from this era exist only in the Patent Office's paper records. A certified copy of the file history can be ordered from the USPTO's paper archives.