Granted Patent
Utility
US 5,723,249 · App. 08/818,667
(1,2-benzisothiazol-3(2H)-ylidene 1,1-dioxide) cyanoacetate charge-control agents for electrostatographic toners
Inventors:
John C. Wilson, Robert D. Fields
Patented Case
View Patent ↗
Granted: Mar 3, 1998
Filed: Mar 14, 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.