Granted Patent
Utility
US 5,089,574 · App. 07/601,100
Trans-1,4-polybutadiene synthesis
Inventor:
Kenneth F. Castner
Patented Case
View Patent ↗
Granted: Feb 18, 1992
Filed: Oct 22, 1990
Inventor
Kenneth F. Castner
Assignee (at issue)
THE GOODYEAR 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.