Granted Patent
Utility
US 5,219,821 · App. 07/657,633
Non-acidic barrier coating
Inventors:
Roberta R. Arbee, Henry W. Goodwin
Patented Case
View Patent ↗
Granted: Jun 15, 1993
Filed: Feb 19, 1991
Inventors
Roberta R. Arbee
Henry W. Goodwin
Assignee (at issue)
Nashua 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.