Granted Patent
Utility
US 5,693,739 · App. 08/576,717
Phenolic polymers from amino phenols and anhydride or epoxy polymers
Inventors:
Edward E. McEntire, Richard M. Nugent, Jr., Ralph C. Gray
Patented Case
View Patent ↗
Granted: Dec 2, 1997
Filed: Dec 21, 1995
Inventors
Edward E. McEntire
Richard M. Nugent, Jr.
Ralph C. Gray
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.