Granted Patent
Utility
US 5,418,296 · App. 08/319,398
Capping of anionic polymers with oxetanes
Inventors:
Carl L. Willis, Daniel E. Goodwin, Robert C. Bening
Patented Case
View Patent ↗
Granted: May 23, 1995
Filed: Oct 6, 1994
Inventors
Carl L. Willis
Daniel E. Goodwin
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.