U.S. patents available from 1976 to present.
U.S. patent applications available from 2005 to present.

Electrokinetic transducing methods and apparatus and systems comprising or utilizing the same

Patent 4789801 Issued on December 6, 1988. Estimated Expiration Date: Icon_subject April 3, 2007. 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.

Patent References

2949550

3892927

Electrostatic dust precipitators
Patent #: 4126434
Issued on: 11/21/1978
Inventor: Keiichi

Ionization voltage source
Patent #: 4232355
Issued on: 11/04/1980
Inventor: Finger ,   et al.

System for charging particles entrained in a gas stream
Patent #: 4259707
Issued on: 03/31/1981
Inventor: Penney

Dermatological ionizing vaporizer Patent #: 4369776
Issued on: 01/25/1983
Inventor: Roberts

Inventor

Application

No. 07/034291 filed on 04/03/1987

US Classes:

310/308, Charge accumulating323/903, PRECIPITATORS361/235, With specific power supply381/111, CIRCUITRY COMBINED WITH SPECIFIC TYPE MICROPHONE OR LOUDSPEAKER96/26, With indicating, signal, or alarm means96/76One or more electrodes common to plural fields

Examiners

Primary: Salce, Patrick R.
Assistant: Jones, Judson H.

Attorney, Agent or Firm

International Classes

B03C 3/34 (20060101)
B03C 3/88 (20060101)
B03C 3/38 (20060101)
B03C 3/66 (20060101)
B03C 3/68 (20060101)
F04D 33/00 (20060101)
H04R 23/00 (20060101)
H02N 11/00 (20060101)

Abstract

Electrokinetic transducing methods and systems are disclosed in which the two electrode arrays confront each other and each electrode in one array is equidistant from the two nearest electrodes in the other array. The electrode arrays are excited by pulsed exciting voltages, the individual pulses of which are preferably all negative or all positive, have durations equal to or less than the pulse intervals, and have rounded leading knees. Embodiments of the invention are disclosed for applications including electrokinetic loudspeakers, ion generators, fans, and electrostatic precipitators.

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