Chemistry: analytical and immunological testing – Silicon containing
Reexamination Certificate
2005-03-08
2005-03-08
Warden, Jill (Department: 1743)
Chemistry: analytical and immunological testing
Silicon containing
C436S174000, C436S176000, C436S106000, C422S068100, C422S082050, C422S082060, C422S082090, C422S083000
Reexamination Certificate
active
06864095
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 (curves1to4) emitted by the sensor in an 8N nitric medium for at least 1000 hours.
REFERENCES:
patent: 197 57 496 (1999-06-01), None
patent: 0 439 318 (1991-07-01), None
patent: 0 631 127 (1994-12-01), None
M.H. Noire et al.: “A new sol-gel derived optical fiber sensor for high acidity measurements: application in nuclear fuel reprocessing” Journal of Sol-Gel Science and Technology, vol. 17, pp. 131-136 2000.
Bouzon Christophe
Davin Thierry
Noire Marie-Hélène
Commissariat a l''Energie Atomique
Compagnie Generale des Matieres Nucleaires
Oblon & Spivak, McClelland, Maier & Neustadt P.C.
Siefke Sam P.
Warden Jill
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