Granted Patent
Utility
US 5,589,318 · App. 08/583,198
High contrast photographic silver halide material
Inventors:
Allison Hazel C. Dale, Roger H. Piggin, Richard A. Hallett, Paul R. McIntyre
Patented Case
View Patent ↗
Granted: Dec 31, 1996
Filed: Jan 4, 1996
Inventors
Allison Hazel C. Dale
Roger H. Piggin
Richard A. Hallett
Paul R. McIntyre
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.