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:
Mar. 08, 2005
Filed:
Aug. 21, 2001
Applicants:
Marie-hélène Noire, Sauveterre, FR;
Christophe Bouzon, Odos, FR;
Thierry Davin, Lapalud, FR;
Inventors:
Assignees:
Commissariat a l'Energie Atomique, Paris, FR;
Compagnie Generale des Matieres Nucleaires, Velizy Villacoublay, FR;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G01N031/00 ;
U.S. Cl.
CPC ...
Abstract
The invention concerns the production of a chemical sensor which can be used to measure nitric acidity. This sensor is produced using a sol-gel method for depositing a porous film, containing a colored indicator, on the core of an optic fiber. The pH of the initial sol is adjusted as are other conditions for implementing the sol-gel method to obtain stability of the signal (curvesto) emitted by the sensor in an 8N nitric medium for at least 1000 hours.