The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 22, 2008
Filed:
Feb. 24, 2005
Gloria Sogan, Epagny, FR;
Julien Bounouar, Annecy-le-Vieux, FR;
Jean-pierre Desbiolles, Cruseilles, FR;
Isabelle Gaurand, Annecy le Vieux, FR;
Gloria Sogan, Epagny, FR;
Julien Bounouar, Annecy-le-Vieux, FR;
Jean-Pierre Desbiolles, Cruseilles, FR;
Isabelle Gaurand, Annecy le Vieux, FR;
Alcatel, Paris, FR;
Abstract
A method and apparatus for detecting minority gaseous species in a mixture by light-emission spectroscopy by means of an optical spectrometer (), in which the radiation emitted by a plasma () present in the gas mixture for analysis is used and, in the spectrum of the radiation, lines are identified of a majority gaseous species that present amplitudes that are sensitive to the presence of a minority species, and information about the concentration of a minority gaseous species is deduced from the amplitude(s) of the sensitive line(s). This makes it possible to monitor minority gaseous species in real time.