Granted Patent
Utility
US 4,740,331 · App. 06/827,045
Salts useful as corrosion inhibitors
Inventors:
Emyr Phillips, David A. Wilson
Patented Case
View Patent ↗
Granted: Apr 26, 1988
Filed: Feb 7, 1986
Inventors
Emyr Phillips
David A. Wilson
Assignee (at issue)
Ciba-Geigy
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.