Granted Patent
Utility
US 5,981,289 · App. 09/170,535
Hydrogen sulfide analyzer
Inventors:
Paul George Wright, David J. Shannon, Lowell Robert Nickolaus, Randy J. Forman, Clifford LaRue McDonald, Jr., Bennett K. Horenstein
Patented Case
View Patent ↗
Granted: Nov 9, 1999
Filed: Oct 13, 1998
Inventors
Paul George Wright
David J. Shannon
Lowell Robert Nickolaus
Randy J. Forman
Clifford LaRue McDonald, Jr.
Bennett K. Horenstein
Assignee (at issue)
Isco, 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.