Granted Patent
Utility
US 4,737,435 · App. 06/932,847
Method of modifying the charging propensity of carrier particles for electrostatographic developers
Inventor:
William E. Yoerger
Patented Case
View Patent ↗
Granted: Apr 12, 1988
Filed: Nov 20, 1986
Inventor
William E. Yoerger
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.