Granted Patent
Utility
US 4,558,012 · App. 06/488,794
Method and member for detecting and/or measuring the concentration of a chemical substance
Inventors:
B. Hakan Nygren, E. Torbjorn Sandstrom, Johan Stenberg, Lars Stiblert
Patented Case
View Patent ↗
Granted: Dec 10, 1985
Filed: Apr 26, 1983
Inventors
B. Hakan Nygren
E. Torbjorn Sandstrom
Johan Stenberg
Lars Stiblert
Assignee (at issue)
SAGAX Instrument AB
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.