Granted Patent
Utility
US 5,194,472 · App. 07/873,303
Ester-containing quaternary ammonium salts as adhesion improving toner charge agents
Inventors:
John C. Wilson, Lawrence P. DeMejo, Alexandra D. Bermel
Patented Case
View Patent ↗
Granted: Mar 16, 1993
Filed: Apr 24, 1992
Inventors
John C. Wilson
Lawrence P. DeMejo
Alexandra D. Bermel
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.