Granted Patent
Utility
US 5,438,109 · App. 08/168,351
Gas barrier coatings of polyepoxide/polyamine products
Inventors:
Richard M. Nugent, Jr., Ken W. Niederst, Jerome A. Seiner
Patented Case
View Patent ↗
Granted: Aug 1, 1995
Filed: Dec 17, 1993
Inventors
Richard M. Nugent, Jr.
Ken W. Niederst
Jerome A. Seiner
Assignee (at issue)
PPG Industries, Inc.
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.