Granted Patent
Utility
US 5,368,740 · App. 08/052,303
Methods of controlling scale formation in the presence of metal ions in aqueous systems
Inventors:
Davor F. Zidovec, Alexander D. Fisher
Patented Case
View Patent ↗
Granted: Nov 29, 1994
Filed: Apr 23, 1993
Inventors
Davor F. Zidovec
Alexander D. Fisher
Assignee (at issue)
Betz PaperChem 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.