Radiant energy – Invisible radiant energy responsive electric signalling – Infrared responsive
Reexamination Certificate
2006-04-18
2006-04-18
Gabor, Otilia (Department: 2884)
Radiant energy
Invisible radiant energy responsive electric signalling
Infrared responsive
C250S339120
Reexamination Certificate
active
07030380
ABSTRACT:
An apparatus for on-line optical monitoring of the quality and/or chemical condition of a fluid; in particular, a hydrocarbon-based fluid used in transportation and industrial applications. The apparatus includes an IR-transparent internal-reflectance-element (IRE) that has at least one essentially flat surface and at least one convex surface, and at least two IR light paths of uniquely determined central-frequency and bandwidth with light from a source entering a flat surface of the IRE, internally reflecting at least once from at least one convex surface of the IRE that can contact a fluid, exiting a flat surface of the IRE, and being received at a detector. The apparatus also includes electronics to power the source and receive output from the detector of each light path. The apparatus can be controlled to independently monitor the IR light reflected within the IRE at the uniquely determined frequency of each path, and to communicate information relevant to the IR light detected.
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Corresponding PCT International Publication No. WO 2004/063727A1 published Jun. 29, 2004 and Search Report mailed.
Boyle Frederick P.
Graf Michelle M.
Taylor William P.
Esposito Michael F.
Gabor Otilia
Gilbert Teresan W.
The Lubrizol Corporation
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