Thomas Grant Stewart

Address:

1269 Hl Holw Way, Apex, NC 27523

VIN:

1HGCM56427A221629

Make:

HONDA

Model:

ACCORD SDN

Year:

2007

US Patent:

6391558, May 21, 2002

Filed:

Apr 14, 2000

Appl. No.:

09/549853

Inventors:

Robert W. Henkens - Beaufort NC
John P. ODaly - Carrboro NC
Marek Wojciechowski - Cary NC
Honghua Zhang - San Diego CA
Najih Naser - Orlando FL
R. Michael Roe - Apex NC
Thomas N. Stewart - Durham NC
Deborah M. Thompson - Raleigh NC
Rebecca Sundseth - Durham NC
Steven E. Wegner - Chapel Hill NC

Assignee:

Andcare, Inc. - Durham NC

International Classification:

C12Q 168

US Classification:

435 6, 435 911, 435 912, 422 681, 422 50, 422 62, 422 63, 422 67, 422 69, 422 8201

Abstract:

An electrochemical detection system which specifically detects selected nucleic acid segments is described. The system utilizes biological probes such as nucleic acid or peptide nucleic acid probes which are complementary to and specifically hybridize with selected nucleic acid segments in order to generate a measurable current when an amperometric potential is applied. The electrochemical signal can be quantified.

US Patent:

7169358, Jan 30, 2007

Filed:

Feb 25, 2002

Appl. No.:

10/082714

Inventors:

Robert W. Henkens - Beaufort NC, US
John P. O'Daly - Carrbor NC, US
Marek Wojciechowski - Cary NC, US
Honghua Zhang - San Diego CA, US
Najih Naser - Orlando FL, US
R. Michael Roe - Apex NC, US
Thomas N. Stewart - Durham NC, US
Deborah M. Thompson - Raleigh NC, US
Rebecca Sundseth - Durham NC, US
Steven E. Wegner - Chapel Hill NC, US

International Classification:

G01N 15/06
G01N 21/76
G01N 21/00
B32B 5/02
C07H 21/00
C12Q 1/68

US Classification:

422 681, 435 6, 422 52, 422 55, 422 821, 422 61, 536 231

Abstract:

An electrochemical detection system which specifically detects selected nucleic acid segments is described. The system utilizes biological probes such as nucleic acid or peptide nucleic acid probes which are complementary to and specifically hybridize with selected nucleic acid segments in order to generate a measurable current when an amperometric potential is applied. The electrochemical signal can be quantified.

US Patent:

7455975, Nov 25, 2008

Filed:

Jan 3, 2007

Appl. No.:

11/619232

Inventors:

Robert W. Henkens - Beaufort NC, US
John P. O'Daly - Carrboro NC, US
Marek Wojciechowski - Cary NC, US
Honghua Zhang - San Diego CA, US
Najih Naser - Orlando FL, US
R. Michael Roe - Apex NC, US
Thomas N. Stewart - Durham NC, US
Deborah M. Thompson - Raleigh NC, US
Rebecca Sundseth - Durham NC, US
Steven E. Wegner - Chapel Hill NC, US

Assignee:

ESA Biosciences, Inc. - Chelmsford MA

International Classification:

C12Q 1/68

US Classification:

435 6

Abstract:

An electrochemical detection system which specifically detects selected nucleic acid segments is described. The system utilizes biological probes such as nucleic acid or peptide nucleic acid probes which are complementary to and specifically hybridize with selected nucleic acid segments in order to generate a measurable current when an amperometric potential is applied. The electrochemical signal can be quantified.

US Patent:

8400138, Mar 19, 2013

Filed:

Jan 29, 2010

Appl. No.:

12/696319

Inventors:

David Michael Cooper - Raleigh NC, US
Thomas Taylor Stewart - Coupeville WA, US
Gary Lee Hielkema - Lynden WA, US

Assignee:

Elster Solutions, LLC - Raleigh NC

International Classification:

G01R 15/18

US Classification:

324117R, 324142, 324547

Abstract:

A current sensing assembly is provided for sensing the current travelling through a current carrying member of a pad mount distribution transformer in a meter network. A current sensor includes a slot having an open end that receives the current carrying member. The sensor includes a conductive coil disposed adjacent the slot that generates an output signal indicating a sensed current level. A retainer member includes a retainer wall that is configured to be inserted into the open end of the slot so as to define a receptacle that captures the current carrying member therein.

US Patent:

20030054424, Mar 20, 2003

Filed:

Mar 27, 2002

Appl. No.:

10/107867

Inventors:

Randy Allen - Apex NC, US
Thomas Stewart - Durham NC, US

International Classification:

G01N033/53
G01N033/537
G01N033/543

US Classification:

435/007920, 435/007100

Abstract:

Immunoassay methods and standards are provided for determining the presence of polychlorinated biphenyl compounds, in a sample of interest: (a) extracting PCB compounds from the sample into a nonpolar solvent that will dissolve the PCB, to produce an analyte extract, (b) contacting the analyte extract with an mAB with specific reactivity towards PCB compounds under conditions suitable for the monoclonal antibody to bind to the PCBs present in the sample, (c) measuring mAB that is selectively bound to PCB compounds and congeners thereof, to provide a binding level, (d) relating the binding level of the mAB of step (c) with binding levels of the same mAB with a control composition, wherein the control composition comprises a plurality of PCB of compounds of known concentration, and then determining concentrations of PCB compounds in the sample.

US Patent:

56795742, Oct 21, 1997

Filed:

Jan 9, 1995

Appl. No.:

8/369805

Inventors:

Stephen B. Friedman - Chapel Hill NC
Thomas N. Stewart - Durham NC
Patrick Mize - Durham NC

Assignee:

Ensys Environmental Products, Inc. - Morrisville NC

International Classification:

G01N 3324

US Classification:

436 29

Abstract:

A method for the quantitative determination of oil in a soil matrix is provided, in which the method involves: extracting a soil sample with a solvent in the presence of a drying agent to provide an extract containing oil, if present in the soil sample, wherein the solvent is capable of complete solvation of oil and is completely miscible with water; filtering the extract; combining the filtered extract with water in the presence of an emulsifier to form an assay sample; and determining the amount of oil in the soil sample by measuring the turbidity of the assay sample to provide a turbidimetric response for the assay sample which correlates to concentration of oil present in the assay sample and comparing the turbidimetric response to a standard curve prepared from performing the methods on soil samples of known oil content. A kit for performing the method is also provided.

US Patent:

53709942, Dec 6, 1994

Filed:

Dec 10, 1993

Appl. No.:

8/165220

Inventors:

Thomas N. Stewart - Durham NC
Glenn P. Vonk - Fuquay-Varina NC
James P. Mapes - Raleigh NC

Assignee:

Becton, Dickinson and Company - Franklin Lakes NJ

International Classification:

C12Q 158
G01N 2100

US Classification:

435 12

Abstract:

A method for detecting urea in a liquid sample in which urease is adsorbed on a solid support such as a membrane and contacted with a solution suspected of containing urea, a pH-dependent reducing agent and a tetrazolium salt. When urea is present in the solution, the adsorbed urease converts it to ammonia, thus raising the pH and causing the pH-dependent reducing agent to reduce the tetrazolium salt to an insoluble colored formazan. The formazan precipitates as a detectable spot on the solid support, indicating the presence of urea in the liquid sample.

US Patent:

51399342, Aug 18, 1992

Filed:

May 25, 1990

Appl. No.:

7/528526

Inventors:

Thomas N. Stewart - Durham NC
Glenn P. Vonk - Fuquay-Varina NC
James P. Mapes - Raleigh NC

Assignee:

Becton, Dickinson and Company - Franklin Lakes NJ

International Classification:

G01N 3353

US Classification:

435 792

Abstract:

A method for enzyme immunoassay of a ligand includes urease as a label. A bound fraction of ligand and antiligand conjugated to urease is formed on a solid support. The urease component of the bound fraction is contacted with a substrate composition for urease which includes a compound converted to ammonia by the urease, a tetrazolium salt and a pH dependent reducing agent which reduces the tetrazolium salt when the pH of the assay medium has been raised by the ammonia. The tetrazolium salt is reduced to a colored insoluble formazan which precipitates as a detectable spot on the support. The invention includes the substrate composition and a kit of materials for performing the assay.