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Patent Assignment Details

NOTE:Results display only for issued patents and published applications. For pending or abandoned applications please consult USPTO staff.

Reel/Frame:	008766/0890			Pages:	6
		Recorded:	10/29/1997
Conveyance:	ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS).

Total properties: 23

Patent #:	4528508	Issue Dt:	07/09/1985	Application #:	06387198	Filing Dt:	06/10/1982
Title:	NUCLEAR MAGNETIC RESONANCE METHOD AND APPARATUS FOR REMOTE DETECTION AND VOLUMETRIC MEASUREMENT OF PETROLEUM RESERVES

Patent #:	4656422	Issue Dt:	04/07/1987	Application #:	06720943	Filing Dt:	04/08/1985
Title:	OIL WELL LOGGING TOOLS MEASURING PARAMAGNETIC LOGGING EFFECT FOR USE IN OPEN BOREHOLES AND CASED WELL BORES

Patent #:	4748415	Issue Dt:	05/31/1988	Application #:	06857160	Filing Dt:	04/29/1986
Title:	METHODS AND APPARATUS FOR INDUCTION LOGGING IN CASED BOREHOLES

Patent #:	4796186	Issue Dt:	01/03/1989	Application #:	06891951	Filing Dt:	07/30/1986
Title:	CONDUCTIVITY DETERMINATION IN A FORMATION HAVING A CASED WELL

Patent #:	4724385	Issue Dt:	02/09/1988	Application #:	06926390	Filing Dt:	11/03/1986
Title:	ACOUSTIC PARAMAGNETIC LOGGING TOOL

Patent #:	4820989	Issue Dt:	04/11/1989	Application #:	06927115	Filing Dt:	11/04/1986
Title:	METHODS AND APPARATUS FOR MEASUREMENT OF THE RESISTIVITY OF GEOLOGICAL FORMATIONS FROM WITHIN CASED BOREHILES

Patent #:	4792757	Issue Dt:	12/20/1988	Application #:	07035084	Filing Dt:	04/06/1987
Title:	OIL WELL LOGGING TOOLS MEASURING PARAMAGNETIC LOGGING EFFECT FOR USE IN OPEN BOREHOLES AND CASED WELL BORES

Patent #:	4882542	Issue Dt:	11/21/1989	Application #:	07089697	Filing Dt:	08/26/1987
Title:	METHODS AND APPARATUS FOR MEASUREMENT OF ELECTRONIC PROPERTIES OF GEOLOGICAL FORMATIONS THROUGH BOREHOLE CASING

Patent #:	4804918	Issue Dt:	02/14/1989	Application #:	07153061	Filing Dt:	02/08/1988
Title:	DUAL EXCITATION ACOUSTIC PARAMAGNETIC LOGGING TOOL

Patent #:	4901023	Issue Dt:	02/13/1990	Application #:	07200573	Filing Dt:	05/31/1988
Title:	METHODS AND APPARATUS FOR MEASUREMENT OF LOW FREQUENCY A.C. MAGNETIC FIELDS WITHIN CASED BOREHOLES TO DETERMINE PROPERTIES OF GEOLOGICAL FORMATIONS

Patent #:	5075626	Issue Dt:	12/24/1991	Application #:	07434886	Filing Dt:	11/13/1989
Title:	AN ELECTRONIC MEASUREMENT APPARATUS MOVABLE IN A CASED BOREHOLE AND COMPENSATING FOR CASING RESISTANCE DIFFERENCES

Patent #:	5043668	Issue Dt:	08/27/1991	Application #:	07435273	Filing Dt:	10/30/1989
Title:	METHODS AND APPARATUS FOR MEASURMENT OF ELECTRONIC PROPERTIES OF GEOLOGICAL FORMATIONS THROUGH BOREHOLE CASING

Patent #:	5043669	Issue Dt:	08/27/1991	Application #:	07438268	Filing Dt:	11/16/1989
Title:	METHODS AND APPARATUS FOR MEASUREMENT OF THE RESISTIVITY OF GEOLOGICAL FORMATIONS FROM WITHIN CASED WELLS IN PRESENCE OF ACOUSTIC AND MAGNETIC ENERGY SOURCES

Patent #:	5065100	Issue Dt:	11/12/1991	Application #:	07474930	Filing Dt:	02/05/1990
Title:	MEASUREMENT OF IN-PHASE AND OUT-OFF-PHASE COMPONENTS OF LOW FEQUENCY A.C. MAGNETIC FIELDS WITHIN CASED BOREHOLES TO MEASURE GEOPHYSICAL PROPERTIES OF GEOLOGICAL FORMATIONS

Patent #:	5187440	Issue Dt:	02/16/1993	Application #:	07749136	Filing Dt:	08/23/1991
Title:	MEASURING RESISTIVITY CHANGES FROM WITHIN A FIRST CASED WELL TO MONITOR FLUIDS INJECTED INTO OIL BEARING GEOLOGICAL FORMATIONS FROM A SECOND CASED WELL WHILE PASSING ELECTRICAL CURRENT BETWEEN THE TWO CASED WELLS

Patent #:	5223794	Issue Dt:	06/29/1993	Application #:	07754965	Filing Dt:	09/04/1991
Title:	METHODS OF OPERATION OF APPARATUS MEASURING FORMATION RESISTIVITY FROM WITHIN A CASED WELL HAVING ONE MEASUREMENT AND TWO COMPENSATION STEPS

Patent #:	5260661	Issue Dt:	11/09/1993	Application #:	07789960	Filing Dt:	11/12/1991
Title:	CALIBRATING AND COMPENSATING INFLUENCE OF CASING THICKNESS VARIATIONS ON MEASUREMENTS OF LOW FREQUENCY A.C. MAGNETIC FIELDS WITHIN CASED BOREHOLES TO DETERMINE PROPERTIES OF GEOLOGICAL FORMATIONS

Patent #:	5570024	Issue Dt:	10/29/1996	Application #:	08083615	Filing Dt:	06/28/1993
Title:	DETERMINING RESISTIVITY OF A FORMATION ADJACENT TO A BOREHOLE HAVING CASING USING MULTIPLE ELECTRODES AND WITH RESISTANCES BEING DEFINED BETWEEN THE ELECTRODES

Patent #:	5633590	Issue Dt:	05/27/1997	Application #:	08214648	Filing Dt:	03/17/1994
Title:	FORMATION RESISTIVITY MEASUREMENTS FROM WITHIN A CASED WELL USED TO QUANTITATIVELY DETERMINE THE AMOUNT OF OIL AND GAS PRESENT

Patent #:	5717334	Issue Dt:	02/10/1998	Application #:	08508781	Filing Dt:	07/28/1995
Title:	METHODS AND APPARATUS TO PRODUCE STICK-SLIP MOTION OF LOGGING TOOL ATTACHED TO A WIRELINE DRAWN UPWARD BY A CONTINUOUSLY ROTATING WIRELINE DRUM

Patent #:	6031381	Issue Dt:	02/29/2000	Application #:	08685796	Filing Dt:	07/23/1996
Title:	ELECTRICAL VOLTAGES AND RESISTANCES MEASURED TO INSPECT METALLIC CASED WELLS AND PIPELINES FOR THICKNESS USING THREE VERTICALLY SPACED ELECTRODES

Patent #:	6025721	Issue Dt:	02/15/2000	Application #:	08738924	Filing Dt:	10/28/1996
Title:	DETERMINING RESISTIVITY OF A FORMATION ADJACENT TO A BOREHOLE HAVING CASING BY GENERATING CONSTANT CURRENT FLOW IN PORTION OF CASING AND USING AT LEAST TWO VOLTAGE MEASUREMENT ELECTRODES

Patent #:	6157195	Issue Dt:	12/05/2000	Application #:	08864309	Filing Dt:	05/27/1997
Title:	FORMATION RESISTIVITY MEASUREMENTS FROM WITHIN A CASED WELL USED TO QUANTITATIVELY DETERMINE THE AMOUNT OF OIL AND GAS PRESENT

Assignor

Exec Dt:

10/21/1997

Assignee

10205 WESTHEIMER ROAD

HOUSTON, TEXAS 77042

Correspondence name and address
	DARRYL M. SPRINGS
	10205 WESTHEIMER ROAD
	HOUSTON, TEXAS 77042-3115

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