Granted Patent
Utility
US 5,683,859 · App. 08/650,675
Photographic developing composition containing a sludge inhibiting agent and use thereof in the high contrast development of nucleated photographic elements
Inventors:
Ronald J. Nothnagle, Jeffrey Richard Sefl, Harold I. Machonkin
Patented Case
View Patent ↗
Granted: Nov 4, 1997
Filed: May 20, 1996
Inventors
Ronald J. Nothnagle
Jeffrey Richard Sefl
Harold I. Machonkin
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.