Granted Patent
Utility
US 5,939,362 · App. 08/958,799
Enhanced corrosion protection by use of friction reducers in conjuction with corrosion inhibitors
Inventors:
John D. Johnson, Shi-Liang Fu, Matthew J. Bluth, Robert A. Marble
Patented Case
View Patent ↗
Granted: Aug 17, 1999
Filed: Oct 27, 1997
Inventors
John D. Johnson
Shi-Liang Fu
Matthew J. Bluth
Robert A. Marble
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.