Granted Patent
Utility
US 5,397,841 · App. 08/163,809
Grafted polymers having reactive groups at the base
Inventors:
Donn A. DuBois, Robert J. Sutherland
Patented Case
View Patent ↗
Granted: Mar 14, 1995
Filed: Dec 8, 1993
Inventors
Donn A. DuBois
Robert J. Sutherland
Assignee (at issue)
SHELL OIL COMPANY
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.