Optics: measuring and testing – By electrophoresis
Reexamination Certificate
2007-11-13
2007-11-13
Chowdhury, Tarifur (Department: 2886)
Optics: measuring and testing
By electrophoresis
Reexamination Certificate
active
11000399
ABSTRACT:
An apparatus and method are disclosed for determining electrophoretic mobility using scattering light phase analysis comprising emitting a laser light along a path and transmitting a first portion of the laser light and reflecting a second portion of the laser light. The apparatus and method can also comprise deflecting one of the first and second portions of the laser in response to a drive signal, holding a sample to receive at least one of the first and second portions of the laser light under an electric field and output a composite light wave, outputting a photopulse signal based on the composite light wave, and measuring the electrophoretic mobility of the sample based on a phase shift analysis using cross-correlation of the photopulse signal with the drive signal.
REFERENCES:
patent: 3732014 (1973-05-01), Uzgiris
patent: 4097153 (1978-06-01), DeRemigis
patent: 5215883 (1993-06-01), Chu
Chang Yu-Jain
Nicoli David
Wu Jau-Sien
Buchanan & Ingersoll & Rooney PC
Chowdhury Tarifur
Cook Jonathon D
Particle Sizing Systems, Inc.
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