Granted Patent
Utility
US 5,141,652 · App. 07/714,211
Water treatment process
Inventors:
Robert M. Moore, Jr., Clarinda M. Whitton, Lawrence H. Shepherd, Jr.
Patented Case
View Patent ↗
Granted: Aug 25, 1992
Filed: Jun 12, 1991
Inventors
Robert M. Moore, Jr.
Clarinda M. Whitton
Lawrence H. Shepherd, Jr.
Assignee (at issue)
Ethyl Corporation
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.