Robert F Keville

US Patent:

7016462, Mar 21, 2006

Filed:

Nov 8, 2002

Appl. No.:

10/065683

Inventors:

Robert F. Keville - Valley Springs CA, US
Daniel D. Dietrich - Livermore CA, US

Assignee:

InterScience, Inc. - Troy NY
KMD Science, Inc. - Valley Springs CA

International Classification:

G01N 23/223

US Classification:

378 47, 378 45, 378 48

Abstract:

A device, system and method for detecting and measuring concentrations of elements in fluids comprises: flowing a fluid through a central flow interelectrode gap of an ionic preconcentration cell separating an upper high specific surface area electrode from a lower high specific surface area electrode of the ionic preconcentration cell by a predetermined interelectrode gap width; and applying a voltage differential between the upper high surface area electrode and the lower high surface area electrode while the fluid is flowing through the central flow interelectrode gap. As such, this cell that utilizes its inherent capacitance for double layer formation to extract ultra-trace levels of ionic contaminants from fluids in order to enhance detection by x-ray fluorescence analysis.

US Patent:

56875754, Nov 18, 1997

Filed:

Apr 29, 1996

Appl. No.:

8/639669

Inventors:

Robert F. Keville - Valley Springs CA

Assignee:

Regents of the University of California - Oakland CA

International Classification:

B01D 800

US Classification:

62 555

Abstract:

A miniature thermo-electric cooled cryogenic pump for removing residual water molecules from an inlet sample prior to sample analysis in a mass spectroscopy system, such as ion cyclotron resonance (ICR) mass spectroscopy. The cryogenic pump is a battery operated, low power (

US Patent:

51534339, Oct 6, 1992

Filed:

Sep 10, 1991

Appl. No.:

7/757418

Inventors:

Brian D. Andresen - Livermore CA
Joel D. Eckels - Livermore CA
James F. Kimmons - Manteca CA
Walter H. Martin - Byron CA
David W. Myers - Livermore CA
Robert F. Keville - Acampo CA

Assignee:

The United States of America as represented by the United States
Department of Energy - Washington DC

International Classification:

H01J 4932

US Classification:

250296

Abstract:

A portable mass spectrometer is described having one or more electrostatic focusing sectors and a magnetic focusing sector, all of which are positioned inside a vacuum chamber, and all of which may be adjusted via adjustment means accessible from outside the vacuum chamber. Mounting of the magnetic sector entirely within the vacuum chamber permits smaller magnets to be used, thus permitting reductions in both weight and bulk.

US Patent:

54770467, Dec 19, 1995

Filed:

Apr 24, 1995

Appl. No.:

8/427326

Inventors:

Daniel D. Dietrich - Livermore CA
Robert F. Keville - Valley Springs CA

Assignee:

Regents of the University of California

International Classification:

H01J 4908

US Classification:

250288

Abstract:

An ion trap which operates in the regime between research ion traps which can detect ions with a mass resolution of better than 1:10. sup. 9 and commercial mass spectrometers requiring 10. sup. 4 ions with resolutions of a few hundred. The power consumption is kept to a minimum by the use of permanent magnets and a novel electron gun design. By Fourier analyzing the ion cyclotron resonance signals induced in the trap electrodes, a complete mass spectra in a single combined structure can be detected. An attribute of the ion trap mass spectrometer is that overall system size is drastically reduced due to combining a unique electron source and mass analyzer/detector in a single device. This enables portable low power mass spectrometers for the detection of environmental pollutants or illicit substances, as well as sensors for on board diagnostics to monitor engine performance or for active feedback in any process involving exhausting waste products.

US Patent:

57304173, Mar 24, 1998

Filed:

May 20, 1996

Appl. No.:

8/650751

Inventors:

Robert F. Keville - Valley Springs CA
Daniel D. Dietrich - Livermore CA

Assignee:

Regents of the University of California - Oakland CA

International Classification:

F16K 3102

US Classification:

25112906

Abstract:

A miniature piezo electric vacuum inlet valve having a fast pulse rate and is battery operated with variable flow capability. The low power (

US Patent:

54517818, Sep 19, 1995

Filed:

Oct 28, 1994

Appl. No.:

8/330766

Inventors:

Daniel D. Dietrich - Livermore CA
Robert F. Keville - Valley Springs CA

Assignee:

Regents of the University of California - Oakland CA

International Classification:

H01J 4938

US Classification:

250291

Abstract:

An ion trap which operates in the regime between research ion traps which can detect ions with a mass resolution of better than 1:10. sup. 9 and commercial mass spectrometers requiring 10. sup. 4 ions with resolutions of a few hundred. The power consumption is kept to a minimum by the use of permanent magnets and a novel electron gun design. By Fourier analyzing the ion cyclotron resonance signals induced in the trap electrodes, a complete mass spectra in a single combined structure can be detected. An attribute of the ion trap mass spectrometer is that overall system size is drastically reduced due to combining a unique electron source and mass analyzer/detector in a single device. This enables portable low power mass spectrometers for the detection of environmental pollutants or illicit substances, as well as sensors for on board diagnostics to monitor engine performance or for active feedback in any process involving exhausting waste products.