Apparatus and method for analyzing particles

Patent 6122599 Issued on September 19, 2000. Estimated Expiration Date:

February 13, 2018. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.

Abstract Claims Description Full Text

Patent References

2656508

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Inventor

Mehta, Shailesh

Application

No. 023207 filed on 02/13/1998

US Classes:

702/100, Fluid or fluid flow measurement702/29Particle size determination

Examiners

Primary: Callahan, Timothy P.
Assistant: Nguyen, Linh

Attorney, Agent or Firm

International Class

G01N 015/02

Abstract

An apparatus for analyzing particles suspended in a fluid. The fluid has electrical properties different from that of the particles. The fluid and particles move from a first fluid containing portion to a second fluid containing portion through a conduit or aperture. A first pair of electrodes, each electrode of the pair being in a respective fluid containing portion. A constricted electrical path is defined between the first and second electrodes, and the path extends along the aperture. At least one other pair of electrodes is positioned in a non-encircling arrangement, and are aligned with each other and transversed to the constricted electrical path. This configuration eliminates many common errors suseptible to other devices.