Granted Patent
Utility
US 4,902,353 · App. 07/259,738
Method for making lithoplate
Inventors:
Elwin L. Rooy, Gerald R. Petrey, James R. Weaver, Douglas A. Granger, Raymond T. Richter, H. Gray Reavis, Jr.
Patented Case
View Patent ↗
Granted: Feb 20, 1990
Filed: Oct 19, 1988
Inventors
Elwin L. Rooy
Gerald R. Petrey
James R. Weaver
Douglas A. Granger
Raymond T. Richter
H. Gray Reavis, Jr.
Assignee (at issue)
Aluminum Company of America
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.