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Patent Assignment Details

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Reel/Frame:	004680/0403			Pages:	7
		Recorded:	02/24/1987
Conveyance:	ASSIGNMENT OF ASSIGNORS INTEREST.

Total properties: 37

Patent #:	3506572	Issue Dt:		Application #:	04552700	Filing Dt:
Title:

Patent #:	3499491	Issue Dt:		Application #:	04741198	Filing Dt:
Title:

Patent #:	3658701	Issue Dt:		Application #:	04783176	Filing Dt:
Title:

Patent #:	3559609	Issue Dt:		Application #:	04787584	Filing Dt:
Title:

Patent #:	3568619	Issue Dt:		Application #:	04802666	Filing Dt:
Title:

Patent #:	3639233	Issue Dt:		Application #:	04808344	Filing Dt:
Title:

Patent #:	3613456	Issue Dt:		Application #:	04844781	Filing Dt:
Title:

Patent #:	3670880	Issue Dt:		Application #:	05061881	Filing Dt:
Title:

Patent #:	3784579	Issue Dt:		Application #:	05234381	Filing Dt:
Title:

Patent #:	3852202	Issue Dt:		Application #:	05298966	Filing Dt:
Title:

Patent #:	3956140	Issue Dt:	05/11/1976	Application #:	05355153	Filing Dt:	04/27/1973
Title:	DRILLING FLUIDS

Patent #:	3878111	Issue Dt:		Application #:	05385355	Filing Dt:
Title:

Patent #:	4012328	Issue Dt:		Application #:	05554881	Filing Dt:
Title:

Patent #:	4139462	Issue Dt:		Application #:	05704267	Filing Dt:	07/12/1976
Title:	DRILL CUTTINGS DISPOSAL SYSTEM WITH GOOD ENVIRONMENTAL AND ECOLOGICAL PROPERTIES

Patent #:	4137367	Issue Dt:		Application #:	05772380	Filing Dt:
Title:

Patent #:	4091868	Issue Dt:	05/30/1978	Application #:	05775332	Filing Dt:	03/07/1977
Title:	METHOD OF TREATING OIL WELLS

Patent #:	4208285	Issue Dt:		Application #:	05953152	Filing Dt:
Title:

Patent #:	4260498	Issue Dt:	04/07/1981	Application #:	05953239	Filing Dt:	10/20/1978
Title:	SILANE COATED SILICATE MINERALS AND METHOD FOR PREPARING SAME

Patent #:	4233366	Issue Dt:		Application #:	05954389	Filing Dt:
Title:

Patent #:	4201679	Issue Dt:	05/06/1980	Application #:	05957622	Filing Dt:	11/03/1978
Title:	DRILLING FLUID ADDITIVE

Patent #:	4220585	Issue Dt:	09/02/1980	Application #:	06027189	Filing Dt:	04/04/1979
Title:	DRILLING FLUID ADDITIVES

Patent #:	4337160	Issue Dt:	06/29/1982	Application #:	06153105	Filing Dt:	05/23/1980
Title:	ACID SOLUBLE WEIGHTING AGENT FOR WELL DRILLING, WORKOVER AND COMPLETION FLUIDS

Patent #:	4471097	Issue Dt:	09/11/1984	Application #:	06338543	Filing Dt:	01/11/1982
Title:	WATER SOLUBLE COPOLYMERS CONTAINING VINYL IMIDAZOLE AS DRILLING FLUID ADDITIVES

Patent #:	4525562	Issue Dt:	06/25/1985	Application #:	06501900	Filing Dt:	06/07/1983
Title:	THERMALLY STABLE DRILLING FLUID ADDITIVE

Patent #:	4579927	Issue Dt:	04/01/1986	Application #:	06536463	Filing Dt:	09/26/1983
Title:	COPOLYMERS OF FLAVANOID TANNINS AND ACRYLIC MONOMERS

Patent #:	4521578	Issue Dt:	06/04/1985	Application #:	06536464	Filing Dt:	09/26/1983
Title:	COMPOSITION AND METHOD OF PREPARATION OF NOVEL AQUEOUS DRILLING FLUID ADDITIVES

Patent #:	4544756	Issue Dt:	10/01/1985	Application #:	06552641	Filing Dt:	11/17/1983
Title:	ZWITERIONIC 2--ALKYL IMIDAZOLINES AS EMULSIFYING AGENTS FOR OIL BASED DRILLING FLUIDS

Patent #:	4596662	Issue Dt:	06/24/1986	Application #:	06620214	Filing Dt:	06/13/1984
Title:	COMPOSITIONS FOR USE IN DRILLING, COMPLETION AND WORKOVER FLUIDS

Patent #:	4710586	Issue Dt:	12/01/1987	Application #:	06661639	Filing Dt:	10/17/1984
Title:	FLUID LOSS ADDITIVES FOR OIL BASE MUDS AND LOW FLUID LOSS COMPOSITIONS THEREOF

Patent #:	4595736	Issue Dt:	06/17/1986	Application #:	06687438	Filing Dt:	12/28/1984
Title:	THERMALLY STABLE DRILLING FLUID ADDITIVE COMPRISED OF A COPOLYMER OF CATECHOL-BASED MONOMER

Patent #:	4615841	Issue Dt:	10/07/1986	Application #:	06727055	Filing Dt:	04/25/1985
Title:	PROCESS FOR MAKING ALKALINE-EARTH METAL SALTS OF ALKARYL SULFONIC ACIDS

Patent #:	4619052	Issue Dt:	10/28/1986	Application #:	06745180	Filing Dt:	06/17/1985
Title:	PROCESS AND APPARATUS FOR DRYING AND CLASSIFYING PARTICULATE GRANULATE MATERIAL

Patent #:	4740319	Issue Dt:	04/26/1988	Application #:	06828621	Filing Dt:	01/29/1986
Title:	OIL BASE DRILLING FLUID COMPOSITION

Patent #:	4713183	Issue Dt:	12/15/1987	Application #:	06838975	Filing Dt:	03/12/1986
Title:	OIL BASED DRILLING FLUID REVERSION

Patent #:	4637883	Issue Dt:	01/20/1987	Application #:	06848559	Filing Dt:	04/07/1986
Title:	FLUID LOSS ADDITIVES FOR OIL BASE MUDS AND LOW FLUID LOSS COMPOSITIONS THEREOF

Patent #:	3522174	Issue Dt:		Application #:	UNAVAILABLE	Filing Dt:
Title:

Patent #:	4034219	Issue Dt:		Application #:	UNAVAILABLE	Filing Dt:
Title:

Assignor

DRESSER INDUSTRIES, INC.,

Exec Dt:

12/11/1986

Assignee

MI DRILLING FLUIDS COMPANY, HOUSTON, TX. A TX. GENERAL PARTNERSHIP

TEXAS

Correspondence name and address
	DRESSER INDUSTRIES, INC.
	P.O. BOX 718
	DALLAS, TX. 75221

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