Granted Patent
Utility
US 6,631,250 · App. 10/004,821
Developer filtration module
Inventors:
David B. Playfair, James J. Franzen, Wayne D. Drinkwater, Jan M. Enderle
Patented Case
View Patent ↗
Granted: Oct 7, 2003
Filed: Dec 7, 2001
Inventors
David B. Playfair
James J. Franzen
Wayne D. Drinkwater
Jan M. Enderle
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.