Granted Patent
Utility
US 5,100,754 · App. 07/449,684
Coated carrier particles and electrographic developers containing them
Inventors:
William E. Yoerger, Frank A. Pettrone
Patented Case
View Patent ↗
Granted: Mar 31, 1992
Filed: Dec 12, 1989
Inventors
William E. Yoerger
Frank A. Pettrone
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.