Granted Patent
Utility
US 5,910,232 · App. 09/095,426
Method for inhibiting polymer formation in styrene processing
Inventors:
Zara Hyde, Vincent E. Lewis
Patented Case
View Patent ↗
Granted: Jun 8, 1999
Filed: Jun 10, 1998
Inventors
Zara Hyde
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.