Granted Patent
Utility
US 6,621,998 · App. 10/014,572
Method and apparatus for formation and development of high solids content toner cake in an electrostatic printing system
Inventors:
Chu-heng Liu, Weizhong Zhao
Patented Case
View Patent ↗
Granted: Sep 16, 2003
Filed: Dec 14, 2001
Inventors
Chu-heng Liu
Weizhong Zhao
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.