Granted Patent
Utility
US 5,599,650 · App. 08/430,359
Photoreaction quenchers in on-press developable lithographic printing plates
Inventors:
Daoshen Bi, Maurice J. Fitzgerald, Frederick Richard Kearney, Rong-Chang Liang, William C. Schwarzel, Tung-Feng Yeh
Patented Case
View Patent ↗
Granted: Feb 4, 1997
Filed: Apr 28, 1995
Inventors
Daoshen Bi
Maurice J. Fitzgerald
Frederick Richard Kearney
Rong-Chang Liang
William C. Schwarzel
Tung-Feng Yeh
Assignee (at issue)
Polaroid Corporation
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.