Granted Patent
Utility
US 5,804,348 · App. 08/842,932
PolyN-(acyl)-4-vinylbenzenesulfonamides! charge-control agents for electrostatographic toners and developers
Inventors:
John C. Wilson, Robert D. Fields
Patented Case
View Patent ↗
Granted: Sep 8, 1998
Filed: Apr 9, 1997
Inventors
John C. Wilson
Robert D. Fields
Assignee (at issue)
EASTMAN KODAK COMPANY
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.