Granted Patent
Utility
US 5,416,168 · App. 08/220,804
Protected functional initiators for making terminally functionalized polymers
Inventors:
Carl L. Willis, Robert C. Bening
Patented Case
View Patent ↗
Granted: May 16, 1995
Filed: Mar 31, 1994
Inventors
Carl L. Willis
Robert C. Bening
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.