Granted Patent
Utility
US 4,530,985 · App. 06/641,637
Process for the preparation of polymers comprising conjugated dienes and optionally monoalkenyl aromatic hydrocarbons
Inventor:
Antonius A. Broekhuis
Patented Case
View Patent ↗
Granted: Jul 23, 1985
Filed: Aug 17, 1984
Inventor
Antonius A. Broekhuis
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.