Optics: measuring and testing – For light transmission or absorption – Of fluent material
Reexamination Certificate
2007-11-27
2007-11-27
Rosenberger, Richard A. (Department: 2877)
Optics: measuring and testing
For light transmission or absorption
Of fluent material
C250S343000
Reexamination Certificate
active
11018625
ABSTRACT:
A non-dispersive infra-red gas detector includes a condensation eliminating heater. The heater can be intermittently energized in response to a signal received from an environmental sensor. Signals from a gas sensor in the detector can be processed to determine when to energize the heater.
REFERENCES:
patent: 4749276 (1988-06-01), Bragg et al.
patent: 4826327 (1989-05-01), Michell
patent: 6191421 (2001-02-01), Yamamori et al.
patent: 2003/0091089 (2003-05-01), Krausse
Honeywell International , Inc.
Rosenberger Richard A.
Welsh & Katz Ltd.
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