Granted Patent
Utility
US 6,091,504 · App. 09/082,662
Method and apparatus for measuring gas concentration using a semiconductor laser
Inventors:
Stephen D. Walker, Robert A. Nichols, William A. Curnan, Sophat Svai, James R. Braig, Daniel S. Goldberger
Patented Case
View Patent ↗
Granted: Jul 18, 2000
Filed: May 21, 1998
Inventors
Stephen D. Walker
Robert A. Nichols
William A. Curnan
Sophat Svai
James R. Braig
Daniel S. Goldberger
Assignee (at issue)
Square One Technology, 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.