Optics: measuring and testing – Photometers
Reexamination Certificate
2007-08-14
2007-08-14
Punnoose, Roy M. (Department: 2886)
Optics: measuring and testing
Photometers
C356S220000, C250S573000
Reexamination Certificate
active
10872669
ABSTRACT:
A photometer device including an inlet passage for receiving a fluid such as an aerosol at a specified flow rate, an outlet passage separated from the inlet passage by a gap, and a radiation passage across the gap. The flow rate and the significant dimension of the inlet passage are set to produce a laminar flow of the aerosol. The gap and the significant dimension of the outlet passage are set to maintain a laminar flow of the aerosol across the gap to prevent contamination of the radiation passage.
REFERENCES:
patent: 3661460 (1972-05-01), Elking et al.
patent: 3869208 (1975-03-01), Lorenz
patent: 4368119 (1983-01-01), Wilson
patent: 4473296 (1984-09-01), Shofner et al.
DeVoe Kevin E.
Gussman Robert A.
BGI Instruments, Inc.
Iandioria & Teska
Punnoose Roy M.
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