Granted Patent
Utility
US 5,679,574 · App. 08/369,805
Quantitative test for oils, crude oil, hydrocarbon, or other contaminants in soil and a kit for performing the same
Inventors:
Stephen B. Friedman, Thomas N. Stewart, Patrick D. Mize
Patented Case
View Patent ↗
Granted: Oct 21, 1997
Filed: Jan 9, 1995
Inventors
Stephen B. Friedman
Thomas N. Stewart
Patrick D. Mize
Assignee (at issue)
EnSys Environmental Products, 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.