Granted Patent
Utility
US 6,171,521 · App. 09/400,926
Zwitterionic water-soluble substituted imine corrosion inhibitors
Inventor:
G. Richard Meyer
Patented Case
View Patent ↗
Granted: Jan 9, 2001
Filed: Sep 22, 1999
Inventor
G. Richard Meyer
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.