Julie Choon Kim

US Patent:

6800608, Oct 5, 2004

Filed:

Jun 22, 2001

Appl. No.:

09/888005

Inventors:

Anthony K. Cheng - Anaheim CA
Julie S. Kim - Placentia CA

Assignee:

Beckman Coulter, Inc. - Fullerton CA

International Classification:

A61K 3800

US Classification:

514 8, 514 2, 435 75, 436533, 530322

Abstract:

This invention relates to stabilized formulations comprising a glycopeptide antibiotic immobilized on carrier particles, and more particularly stabilized vancomycin bidentate conjugate formulations for assaying the concentration of vancomycin in a test sample. The invention also relates to assay formats that utilize such stabilized formulations. The invention further provides a test kit for detecting the presence of vancomycin in a test sample, wherein the test kit includes a stabilized vancomycin conjugate formulation. The invention further provides a novel rate enhancer for immunoassays for enhancing the rate of binding of an anti-analyte antibody to the analyte.

US Patent:

7179658, Feb 20, 2007

Filed:

Sep 6, 2001

Appl. No.:

09/947990

Inventors:

Anthony K. Cheng - Anaheim CA, US
Julie S. Kim - Placentia CA, US
Chan S. Oh - Chino Hills CA, US

Assignee:

Beckman Coulter, Inc. - Fullerton CA

International Classification:

G01N 33/543

US Classification:

436518, 435 71, 435 792, 436172, 436524, 204451

Abstract:

The invention provides highly sensitive and rapid homogeneous assays which employ particle-enhanced assay formats in concert with capillary electrophoresis and laser-induced fluorescence (LIF) detection to determine the concentration of an analyte of interest in a sample. Such a determination is made by measuring fluorescent signal(s) (i. e. , an electropherogram) produced upon LIF of species present in the reaction mixture that are capable of producing such signals. The method of this invention produces simplified electropherograms by reducing the number of signals that must be separated and subsequently measured, and therefore increases the accuracy of the detection and/or quantification of target analyte concentration in a sample.

US Patent:

7556932, Jul 7, 2009

Filed:

Dec 14, 2006

Appl. No.:

11/611072

Inventors:

Anthony K. Cheng - Anaheim CA, US
Julie S. Kim - Placentia CA, US
Chan S. Oh - Chino Hills CA, US

Assignee:

Beckman Coulter, Inc. - Fullerton CA

International Classification:

G01N 33/00

US Classification:

435 794, 435 71, 435 792, 436172, 436518, 436524, 204451

Abstract:

The invention provides highly sensitive and rapid homogeneous assays which employ particle-enhanced assay formats in concert with capillary electrophoresis and laser-induced fluorescence (LIF) detection to determine the concentration of an analyte of interest in a sample. Such a determination is made by measuring fluorescent signal(s) (i. e. , an electropherogram) produced upon LIF of species present in the reaction mixture that are capable of producing such signals. The method of this invention produces simplified electropherograms by reducing the number of signals that must be separated and subsequently measured, and therefore increases the accuracy of the detection and/or quantification of target analyte concentration in a sample.

US Patent:

57053537, Jan 6, 1998

Filed:

Jun 7, 1995

Appl. No.:

8/483288

Inventors:

Chan S. Oh - Chino Hills CA
Julie S. Kim - Placentia CA
Anthony K. Cheng - Anaheim CA

Assignee:

Beckman Instruments, Inc. - Fullerton CA

International Classification:

G01N 3353
G01N 33537
G01N 33543

US Classification:

435 792

Abstract:

An assay for determining the presence of an analyte of interest in a test sample containing an interfering substance that interferes with the assay is disclosed. The assay comprises the steps of forming a reaction mixture by combining in an assay medium (i) an assay system containing components for detecting the analyte of interest, (ii) a test sample containing the analyte and an interfering substance, and (iii) an additional amount of the interfering substance in a quantity sufficient to substantially mask the effect of the interfering substance in the test sample. This reaction mixture is incubated under conditions sufficient to allow complex formation. This resultant complex formation is detected and the presence of the analyte in the test sample is determined.

US Patent:

51107422, May 5, 1992

Filed:

Oct 19, 1990

Appl. No.:

7/600453

Inventors:

Frank R. Shu - La Habra Heights CA
Julie S. Kim - Placentia CA

Assignee:

Beckman Instruments, Inc. - Fullerton CA

International Classification:

G01N 27327
G01N 27333

US Classification:

436 18

Abstract:

An indirect potentiometric method and diluent for the analysis of lithium are disclosed. The diluent includes effective amounts of a pH buffer, at least one lithium salt, and a non-cationic surfactant containing at least one hydrophobic group, at least one hydrophillic group and being substantially free of polyoxyethylene groups. Most preferably, the pH buffer is tris-(hydroxymethyl)aminomethane-phosphate, the lithium salt is lithium chloride, and the surfactant is 2,4,7,9-tetramethyl-5-decyn-4,7 diol. An indirect potentiometric determination of lithium in a clinical sample comprises the steps of mixing the sample with a diluent, contacting an aliquot of the diluted sample with a lithium specific ion selective electrode and at least one ion selective electrode specifically responsive to a monovalent interfering ion, and measuring both the response of the lithium specific ion selective electrode and the monovalent interfering ion specific ion selective electrode, the responses being an indication of the concentration of lithium in the sample.

US Patent:

56270801, May 6, 1997

Filed:

Jul 29, 1994

Appl. No.:

8/283116

Inventors:

Anthony K. Cheng - Anaheim CA
Julie S. Kim - Placentia CA
Chan S. Oh - Chino Hills CA

Assignee:

Beckman Instruments, Inc. - Fullerton CA

International Classification:

G01N 33546

US Classification:

436534

Abstract:

Methods for modulating the rates and dose responses of immunoassays through the incorporation of one or more detergents into the immunoassay reaction are disclosed. The methods are particularly suitable for automated immunoassay formats, especially with formats that use analyte-biotin bidentate reagents. The methods may be used to facilitate the detection of any desired, preselected pharmacological agent.

US Patent:

52886786, Feb 22, 1994

Filed:

Aug 23, 1991

Appl. No.:

7/749074

Inventors:

Frank R. Shu - La Habra Heights CA
Julie S. Kim - Placentia CA

Assignee:

Beckman Instruments, Inc. - Fullerton CA

International Classification:

G01N 27327

US Classification:

436 18

Abstract:

An indirect potentiometric method and diluent for the analysis of lithium are disclosed. The diluent includes effective amounts of a pH buffer and a non-cationic surfactant comprising at least one hydrophobic group, at least one hydrophillic group and being substantially free of polyoxyethylene groups. Most preferably, the pH buffer is tris-(hydroxymethyl) aminomethane-phosphate, and the surfactant is 2, 4, 7, 9-tetramethyl-5-decyn-4,7 diol. An indirect potentiometric determination of lithium in a clinical sample comprises the steps of mixing the sample with a diluent, contacting an aliquot of the diluted sample with a lithium specific ion selective electrode and at least one ion selective elctrode specifically responsive to a monovalent interfering ion, and measuring both the response of the lithium specific ion selective electrode and the monovalent interfering ion specific ion selective electrode, the responses being an indication of the concentration of lithium in the sample.