Granted Patent
Utility
US 5,391,663 · App. 08/155,665
Protected functional initiators for making terminally functionalized polymers
Inventors:
Robert C. Bening, Carl L. Willis
Patented Case
View Patent ↗
Granted: Feb 21, 1995
Filed: Nov 22, 1993
Inventors
Robert C. Bening
Carl L. Willis
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.