Granted Patent
Utility
US 6,723,404 · App. 10/091,890
Inhibition of ethylene oxide autopolymerization
Inventor:
Thomas H. Johnson
Patented Case
View Patent ↗
Granted: Apr 20, 2004
Filed: Mar 6, 2002
Inventor
Thomas H. Johnson
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.