Granted Patent
Utility
US 6,423,209 · App. 09/687,369
Acid gas measuring sensors and method of using same
Inventors:
Martin Weber, Christoph Braden, Serguei Tsapakh
Patented Case
View Patent ↗
Granted: Jul 23, 2002
Filed: Oct 13, 2000
Inventors
Martin Weber
Christoph Braden
Serguei Tsapakh
Assignee (at issue)
ADVANCED TECHNOLOGY & MATERIALS CO., LTD.
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.