Granted Patent
Utility
US 5,453,522 · App. 08/308,972
Colorant for use in business recording
Inventors:
Chester Davis, Ford P. Wilgis, Vernon J. Shiner, Jr.
Patented Case
View Patent ↗
Granted: Sep 26, 1995
Filed: Sep 20, 1994
Inventors
Chester Davis
Ford P. Wilgis
Vernon J. Shiner, Jr.
Assignee (at issue)
THE TRUSTEES OF INDIANA UNIVERSITY
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.