Granted Patent
Utility
US 6,734,435 · App. 09/870,179
Photo-ionization detector and method for continuous operation and real-time self-cleaning
Inventors:
Hong T. Sun, Peter Hsi
Patented Case
View Patent ↗
Granted: May 11, 2004
Filed: May 29, 2001
Inventors
Hong T. Sun
Peter Hsi
Assignee (at issue)
RAE SYSTEMS, INC.
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.