Granted Patent
Utility
US 6,242,537 · App. 09/260,239
Gel-free process for making hydrogenated functionalized anionically polymerized polymers
Inventors:
Robert C. Bening, Carl L. Willis, Charles Roy Donaho, Daniel E. Goodwin, Zaida Diaz, John D. Wilkey
Patented Case
View Patent ↗
Granted: Jun 5, 2001
Filed: Mar 2, 1999
Inventors
Robert C. Bening
Carl L. Willis
Charles Roy Donaho
Daniel E. Goodwin
Zaida Diaz
John D. Wilkey
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.