Granted Patent
Utility
US 5,587,438 · App. 08/455,371
Process for preparing styrene polymers
Inventors:
Frederik L. Binsbergen, Alouisius Nicolaas Renée BOS, Augustinus Santen
Patented Case
View Patent ↗
Granted: Dec 24, 1996
Filed: May 31, 1995
Inventors
Frederik L. Binsbergen
Alouisius Nicolaas Renée BOS
Augustinus Santen
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.