Granted Patent
Utility
US 5,486,294 · App. 08/316,611
Method of inhibiting barium sulfate and strontium sulfate scale at low pH
Inventor:
J. Michael Brown
Patented Case
View Patent ↗
Granted: Jan 23, 1996
Filed: Sep 30, 1994
Inventor
J. Michael Brown
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.