Granted Patent
Utility
US 6,014,889 · App. 09/184,060
Gas analyzer
Inventor:
Rolf Castor
Patented Case
View Patent ↗
Granted: Jan 18, 2000
Filed: Nov 2, 1998
Inventor
Rolf Castor
Assignee (at issue)
Siemens Elema 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.