Granted Patent
Utility
US 5,124,659 · App. 07/485,329
Measurement of pH and specific ion concentration
Inventors:
Frank R. Frola, John T. Schneider
Patented Case
View Patent ↗
Granted: Jun 23, 1992
Filed: Feb 20, 1990
Inventors
Frank R. Frola
John T. Schneider
Assignee (at issue)
Fisher Scientific Company, L.L.C.
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.