Granted Patent
Utility
US 4,493,881 · App. 06/506,255
Electrophotographic method for producing black and color separation images
Inventors:
John D. Mitchell, Stephen Michel
Patented Case
View Patent ↗
Granted: Jan 15, 1985
Filed: Jun 20, 1983
Inventors
John D. Mitchell
Stephen Michel
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.