Resumes
Resumes
Bennett Hauenstein Phones & Addresses
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8 Southfield Dr, Nashua, NH 03064 (603) 880-1349
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Andover, MA
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Tewksbury, MA
Work
Position:
Professional/Technical
Education
Degree:
Graduate or professional degree
Publications
Us Patents
Luminescent Oxygen Sensor Based On A Lanthanide Complex
View pageUS Patent:
51907291, Mar 2, 1993
Filed:
Feb 14, 1991
Appl. No.:
7/655648
Inventors:
Bennett L. Hauenstein - Andover MA
Harry G. Brittain - Maplewood NJ
James R. Nestor - Nashua NH
Harry G. Brittain - Maplewood NJ
James R. Nestor - Nashua NH
Assignee:
C. R. Bard, Inc. - Murray Hill NJ
International Classification:
G01N 2164
US Classification:
422 91
Abstract:
An oxygen sensor is provided for determination of the partial pressure of oxygen. In one aspect, the invention consists of oxygen-quenchable luminescent lanthanide complexes for an oxygen sensor. The complexes are oxygen-quenchable even though immobilized in a solid matrix, such as a solid polymeric matrix, and preferably are terbium complexes of Schiff base or. beta. -diketone ligands. Certain preferred processes are described for improving the oxygen sensitivity of the lanthanide complexes. In another aspect, the invention consists of a combination measuring and reference analyte sensor containing both quenchable and nonquenchable luminescent materials. The materials luminesce at different wavelengths and thus may be transmitted together down a single optical fiber and later discriminated by means of filters and separtely detected. In a third aspect, the invention consists of a low-noise phosphorescent analyte sensor employing a gatable detector. By use of an analyte-quenchable material having a relatively long-lived phosphorescence, a pulsed excitation source, and selectively coupling the detector after the excitation source is off and any short-lived background luminescence has ended, a low-noise output signal consisting of the long-lived phosphorescence is selectively detected and the concentration of the analyte determined therefrom.
Luminescent Oxygen Sensor Based On A Lanthanide Complex
View pageUS Patent:
48617270, Aug 29, 1989
Filed:
Sep 8, 1986
Appl. No.:
6/904963
Inventors:
Bennett L. Hauenstein - Andover MA
Harry G. Brittain - Maplewood NJ
James R. Nestor - Nashua NH
Harry G. Brittain - Maplewood NJ
James R. Nestor - Nashua NH
Assignee:
C. R. Bard, Inc. - Murray Hill NJ
International Classification:
G01N 3300
US Classification:
436136
Abstract:
An oxygen sensor is provided for determination of the partial pressure of oxygen. In one aspect, the invention consists of oxygen-quenchable luminescent lanthanide complexes for an oxygen sensor. The complexes are oxygen-quenchable even though immobilized in a solid matrix, such as a solid polymeric matrix, and preferably are terbium complexes of Schiff base or. beta. -diketone ligands. Certain preferred processes are described for improving the oxygen sensitivity of the lanthanide complexes. In another aspect, the invention consists of a combination measuring and reference analyte sensor containing both quenchable and nonquenchable luminescent materials. The materials luminesce at different wavelengths and thus may be transmitted together down a single optical fiber and later descriminated by means of filters and separately detected. In a third aspect, the invention consists of a low-noise phosphorescent analyte sensor employing a gatable detector. By use of an analyte-quenchable material having a relatively long-lived phosphorescence, a pulsed excitation source, and selectively coupling the detector after the excitation source is off and any short-lived background luminescence has ended, a low-noise output signal consisting of the long-lived phosphorescence is selectively detected and the concentration of the analyte determined therefrom.
Precalibrated Fiber Optic Sensing Method
View pageUS Patent:
52348350, Aug 10, 1993
Filed:
Sep 26, 1991
Appl. No.:
7/766021
Inventors:
James R. Nestor - Northborough MA
Bennett L. Hauenstein - Nashua NH
Bennett L. Hauenstein - Nashua NH
Assignee:
C.R. Bard, Inc. - Murray Hill NJ
International Classification:
G01N 2100
US Classification:
436 11
Abstract:
A precalibrated sensing system for determining a blood parameter such as the partial pressures of oxygen (pO. sub. 2) and carbon dioxide (pCO. sub. 2), and the negative logarithm of hydrogen ion activity (pH). A dry sensor is provided which may be calibrated in the factory, packaged, sterilized and stored, without requiring recalibration prior to use.