Granted Patent
Utility
US 4,501,667 · App. 06/582,213
Process of inhibiting corrosion of metal surfaces and/or deposition of scale thereon
Inventor:
Barry Cook
Patented Case
View Patent ↗
Granted: Feb 26, 1985
Filed: Feb 21, 1984
Inventor
Barry Cook
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.