Granted Patent
Utility
US 5,073,339 · App. 07/571,063
Method of inhibiting corrosion and scale formation in aqueous systems
Inventor:
Robert P. Kreh
Patented Case
View Patent ↗
Granted: Dec 17, 1991
Filed: Aug 23, 1990
Inventor
Robert P. Kreh
Assignee (at issue)
W.R. Grace & Co. Conn.
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.