Granted Patent
Utility
US 5,264,155 · App. 07/893,183
Methods for inhibiting the corrosion and deposition of iron and iron containing metals in aqueous systems
Inventor:
William J. Yorke
Patented Case
View Patent ↗
Granted: Nov 23, 1993
Filed: Jun 3, 1992
Inventor
William J. Yorke
Assignee (at issue)
Betz Laboratories, Inc.
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.