Granted Patent
Utility
US 5,336,441 · App. 07/706,661
Corrosion inhibition in highly acidic environments by use of pyridine salts in combination with certain cationic surfactants
Inventors:
Sayed Sadiq Shah, William F. Fahey, Bernardus A. Oude Alink
Patented Case
View Patent ↗
Granted: Aug 9, 1994
Filed: May 29, 1991
Inventors
Sayed Sadiq Shah
William F. Fahey
Bernardus A. Oude Alink
Assignee (at issue)
Petrolite Corporation
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.