Granted Patent
Utility
US 5,762,821 · App. 08/698,231
Compound for removing alkaline earth metal scale deposits and silica-based scale deposits
Inventor:
Robert D. Tate
Patented Case
View Patent ↗
Granted: Jun 9, 1998
Filed: Aug 14, 1996
Inventor
Robert D. Tate
Assignee (at issue)
Ambar, 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.