Measuring and testing – Particle size
Reexamination Certificate
2007-05-08
2007-05-08
Williams, Hezron (Department: 2856)
Measuring and testing
Particle size
Reexamination Certificate
active
11240161
ABSTRACT:
A multi-stage differential mobility analyzer (MDMA) for aerosol measurements includes a first electrode or grid including at least one inlet or injection slit for receiving an aerosol including charged particles for analysis. A second electrode or grid is spaced apart from the first electrode. The second electrode has at least one sampling outlet disposed at a plurality different distances along its length. A volume between the first and the second electrode or grid between the inlet or injection slit and a distal one of the plurality of sampling outlets forms a classifying region, the first and second electrodes for charging to suitable potentials to create an electric field within the classifying region. At least one inlet or injection slit in the second electrode receives a sheath gas flow into an upstream end of the classifying region, wherein each sampling outlet functions as an independent DMA stage and classifies different size ranges of charged particles based on electric mobility simultaneously.
REFERENCES:
patent: 6230572 (2001-05-01), Pui et al.
patent: 6639671 (2003-10-01), Liu
patent: 6787763 (2004-09-01), De La Mora et al.
Chen et al. “Design and evaluation of nanometer aerosol differential mobility analyzer (Nano-DMA)”, J. Aerosol Sci., 1998, 29(5/6):497-200.
Seol et al. “A differential mobility analyzer with adjustable column length for wide particle-size-range measurements”, J. Aerosol Sci., 2002, 33:1481-1492.
Chen Da-Ren
Cheng Meng-Dawn
Akerman & Senterfitt
Bellamy Tamiko
Jetter Neil
Quinones Eduardo J.
UT-Battelle LLC
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