Granted Patent
Utility
US 4,403,091 · App. 06/425,754
Ungelled hydroxy group-containing oligomers
Inventors:
Marvis E. Hartman, Barbara A. Greigger, Rostyslaw Dowbenko
Patented Case
View Patent ↗
Granted: Sep 6, 1983
Filed: Sep 28, 1982
Inventors
Marvis E. Hartman
Barbara A. Greigger
Rostyslaw Dowbenko
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.