Granted Patent
Utility
US 4,520,123 · App. 06/627,246
Catalyst system and process for polymerizing conjugated dienes
Inventor:
James E. Hall
Patented Case
View Patent ↗
Granted: May 28, 1985
Filed: Jul 2, 1984
Inventor
James E. Hall
Assignee (at issue)
The Firestone Tire & Rubber 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.