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US Patent 5126022 - Method and device for moving molecules by the application of a plurality of electrical fields

US Patent Issued on June 30, 1992
Estimated Patent Expiration Date: Icon_subject February 28, 2010Estimated 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.
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Abstract

Devices and methods are disclosed for moving charged molecules through a medium by the application of a plurality of electrical fields of sufficient strength and applied for sufficient amounts of time so as to move the charged molecules through the medium. The devices although preferably small in size, preferably generate large numbers (100 or more) of electrical fields to a movement area which preferably contains a liquid buffered or gel medium. Mixtures of charged molecules are pulled through the gel by the force of the electrical fields. The fields are preferably activated simultaneously or sequentially one after another at various speeds to create complex force field distributions or moving field waves along the separation medium. Charged molecules capable of moving quickly through the gel will be moved along by the faster moving field waves and be separated from slower moving molecules. The fields can be activated by computer software and can be used to move molecules away from and toward each other to obtain rapid and complex chemical synthesis, sequencing or reaction protocols.

Inventors

Assignee

Application

No. 487021 filed on 02/28/1990

US Classes:

204/458, Plural rapid changes in direction of electric field (at least 1,000 times total and at more than 1/sec) (e.g., pulsed field, etc.)204/547, Dielectrophoresis (i.e., using nonuniform electric field)204/609, Plural rapid changes in direction of electric field (at least 1,000 times total and at more than 1/sec) (e.g., pulsed field, etc.)204/643Dielectrophoretic (i.e., uses nonuniform electric field)

Examiners

Primary: Niebling, John F.
Assistant: Ryser, David G.

Attorney, Agent or Firm

US Patent References

4471647, Gas chromatography system and detector and method
Issued on: 09/18/1984
Inventor: Jerman ,   et al.
4474889, Miniature gas chromatograph apparatus
Issued on: 10/02/1984
Inventor: Terry ,   et al.
4740283, Pulsed-field gradient gel electrophoretic apparatus
Issued on: 04/26/1988
Inventor: Laas ,   et al.
4834862, Ampholyte separation method and apparatus
Issued on: 05/30/1989
Inventor: Breiner ,   et al.
4891120, Chromatographic separation device
Issued on: 01/02/1990
Inventor: Sethi, et al.
4908112, Silicon semiconductor wafer for analyzing micronic biological samples
Issued on: 03/13/1990
Inventor: Pace
4911817, Electrophoresis apparatus
Issued on: 03/27/1990
Inventor: Kindlmann
4935040Miniature devices useful for gas chromatography
Issued on: 06/19/1990
Inventor: Goedert

Foreign Patent References

  • 0361046 EP. 08/20/1989
  • 0356187 EP. 02/20/1990
  • WO84/02001 WO. 05/20/1984

International Class

G01N 027/26

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