Granted Patent
Utility
US 4,748,211 · App. 06/887,501
Hydroxyl functional graft copolymers
Inventors:
Suryya K. Das, Rostyslaw Dowbenko, Samuel Porter, Jr.
Patented Case
View Patent ↗
Granted: May 31, 1988
Filed: Jul 21, 1986
Inventors
Suryya K. Das
Rostyslaw Dowbenko
Samuel Porter, Jr.
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.