Granted Patent
Utility
US 4,999,286 · App. 06/946,547
Sulfate reducing bacteria determination and control
Inventors:
Len J. Gawel, Thomas K. Ng, James M. Odom, Richard C. Ebersole
Patented Case
View Patent ↗
Granted: Mar 12, 1991
Filed: Dec 23, 1986
Inventors
Len J. Gawel
Thomas K. Ng
James M. Odom
Richard C. Ebersole
Assignee (at issue)
E.I. DU PONT DE NEMOURS AND COMPANY
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.