Granted Patent
Utility
US 6,793,889 · App. 09/928,459
Wide-range TOC instrument using plasma oxidation
Inventors:
Ulf W. Naatz, Yasuo Yamamori, John Stillian, Tsutomo Asano
Patented Case
View Patent ↗
Granted: Sep 21, 2004
Filed: Aug 14, 2001
Inventors
Ulf W. Naatz
Yasuo Yamamori
John Stillian
Tsutomo Asano
Assignee (at issue)
Hach Company
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.