Granted Patent
Utility
US 5,278,331 · App. 07/594,404
Waste treatment in dialkyl phosphorochloridothioate production
Inventors:
Charles T. Bounds, Gary D. Focht, W. Brian Harrod
Patented Case
View Patent ↗
Granted: Jan 11, 1994
Filed: Oct 9, 1990
Inventors
Charles T. Bounds
Gary D. Focht
W. Brian Harrod
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.