Granted Patent
Utility
US 5,650,331 · App. 07/770,388
Optical high acidity sensor
Inventors:
Betty S. Jorgensen, Howard L. Nekimken, W. Patrick Carey, Patrick E. O'Rourke
Patented Case
View Patent ↗
Granted: Jul 22, 1997
Filed: Oct 3, 1991
Inventors
Betty S. Jorgensen
Howard L. Nekimken
W. Patrick Carey
Patrick E. O'Rourke
Assignee (at issue)
United States Department of Energy
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.