Granted Patent
Utility
US 4,647,635 · App. 06/844,042
Initiator systems for polymerization of 1,3-dienes or copolymers containing 1,3-dienes
Inventor:
James E. Hall
Patented Case
View Patent ↗
Granted: Mar 3, 1987
Filed: Mar 25, 1986
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.