Granted Patent
Utility
US 5,186,767 · App. 07/613,853
Lithoplate and method for making same
Inventors:
Elwin L. Rooy, Gerald R. Petrey, James R. Weaver, Douglas A. Granger, Raymond T. Richter, H. Gray Reravis, Jr.
Patented Case
View Patent ↗
Granted: Feb 16, 1993
Filed: Jan 7, 1991
Inventors
Elwin L. Rooy
Gerald R. Petrey
James R. Weaver
Douglas A. Granger
Raymond T. Richter
H. Gray Reravis, 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.