Granted Patent
Utility
US 5,336,737 · App. 07/567,843
Process for the preparation of random copolymers of conjugated dienes and vinyl aromatic compounds
Inventors:
Hendrik van Ballegooijen, Joseph P. M. Peters, Johannes T. A. Plum
Patented Case
View Patent ↗
Granted: Aug 9, 1994
Filed: Aug 15, 1990
Inventors
Hendrik van Ballegooijen
Joseph P. M. Peters
Johannes T. A. Plum
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.