Granted Patent
Utility
US 5,955,643 · App. 08/953,427
Composition and method for inhibiting polymerization during the anaerobic of styrene
Inventor:
Vincent E. Lewis
Patented Case
View Patent ↗
Granted: Sep 21, 1999
Filed: Oct 17, 1997
Inventor
Vincent E. Lewis
Assignee (at issue)
Nalco/Exxon Energy Chemicals, L.P.
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.