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Patent Assignment Assignor Details

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Assignor Name : KEY ENERGY SERVICES, LLC

Total Assignments: 13

Assignment: 1

Reel/Frame:	021617/0689			Pages:	5
		Recorded:	10/02/2008
Attorney Dkt #:	08876.105020
Conveyance:	ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS).

Assignor

KEY ENERGY SERVICES, LLC

Exec Dt:

10/02/2008

Assignee

KEY ENERGY SERVICES, INC.

1301 MCKINNEY STREET

SUITE 1800

HOUSTON, TEXAS 77010

Property

Pat #

Pub #

Intl #

App #

6168054

NONE

09200490

Correspondence name and address
	KING & SPALDING LLP, JILL A. MCWHIRTER
	1100 LOUISIANA
	SUITE 4000
	HOUSTON, TX 77002

Assignment: 2

Reel/Frame:	021617/0697			Pages:	5
		Recorded:	10/02/2008
Attorney Dkt #:	08876.105021
Conveyance:	ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS).

Assignor

KEY ENERGY SERVICES, LLC

Exec Dt:

10/02/2008

Assignee

KEY ENERGY SERVICES, INC.

1301 MCKINNEY STREET

SUITE 1800

HOUSTON, TEXAS 77010

Property

Pat #

Pub #

Intl #

App #

6164493

NONE

09566166

Correspondence name and address
	KING & SPALDING LLP, JILL MCWHIRTER
	1100 LOUISIANA
	SUITE 4000
	HOUSTON, TX 77002

Assignment: 3

Reel/Frame:	024906/0588			Pages:	7
		Recorded:	08/30/2010
Attorney Dkt #:	060877.091176
Conveyance:	SECURITY AGREEMENT

Assignor

KEY ENERGY SERVICES, LLC

Exec Dt:

08/26/2010

Assignee

BANK OF AMERICA, N.A.

901 MAIN STREET, TX-492-14-11

DALLAS, TEXAS 75202

Properties

Pat #	Pub #	Intl #	App #	Pat #	Pub #	Intl #	App #	Pat #	Pub #	Intl #	App #
5297631	NONE		08044187	5439066	NONE		08266011	5711382	NONE		08506955
5988299	NONE		08623041	6079490	NONE		09058477	6168054	NONE		09200490
6377189	NONE		09281864	6212763	NONE		09342564	6276449	NONE		09533511
6253849	NONE		09534599	6209639	NONE		09534601	6213207	NONE		09535239
6241020	NONE		09535555	6164493	NONE		09566166	6533519	NONE		09620580
6374706	NONE		09768551	6728638	US20020156582		09838857	6826492	US20020156591		09839444
6578634	US20030042020		09945924	6758095	US20030188584		10046688	7006009	US20030183382		10113609
7004456	US20040065874		10263630	6898983	US20040089076		10292715	6719515	US20030147726		10389026
7064677	US20030196798		10440633	7221155	US20040196032		10760650	7029422	US20040192507		10778835
7228899	US20040188088		10778846	6969223	US20040197166		10818575	7226037	US20060163545		10925813
7461830	US20050114001		10942730	7006920	US20050103491		10957309	7114577	US20050199388		11066576
7359801	US20070056746		11516105	7519508	US20070067107		11516153	7519475	US20070089878		11517919
7513338	US20070056811		11517920	NONE	US20070056727		11518701	7588083	US20080035333		11690483
7571054	US20080035334		11690904	7672785	US20080035335		11691031	7788054	US20070227225		11691163
7518526	US20080037368		11691219	7657376	US20070288169		11827052	7793918	US20090057630		11850391
7917293	US20090063054		11850398	7631563	US20090056467		11850405	8590401	US20100132180		12627529
8280639	US20100138159		12627542	8449779	US20110215058		12685549

Correspondence name and address
	CONSTANCE G. RHEBERGEN
	711 LOUISIANA ST., SUITE 2300
	HOUSTON, TX 77002-2770

Assignment: 4

Reel/Frame:	025095/0151			Pages:	9
		Recorded:	10/06/2010
Attorney Dkt #:	PATTERSON-UTI/11004922
Conveyance:	ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS).

Assignor

KEY ENERGY SERVICES, LLC

Exec Dt:

10/01/2010

Assignee

UNIVERSAL PRESSURE PUMPING, INC.

450 GEARS ROAD

SUITE 500

HOUSTON, TEXAS 77067

Properties

Pat #

Pub #

Intl #

App #

Pat #

Pub #

Intl #

App #

7066266

US20050230117

10826783

7273104

US20060021753

11161185

Correspondence name and address
	HUYEN LUONG
	1301 MCKINNEY STREET
	FULBRIGHT & JAWORSKI L.L.P.
	HOUSTON, TX 77010

Assignment: 5

Reel/Frame:	025676/0857			Pages:	5
		Recorded:	01/24/2011
Attorney Dkt #:	060877-091176
Conveyance:	PATENT SECURITY AGREEMENT SUPPLEMENT BETWEEN KEY ENERGY SERVIXES, LLC AND BANK OF AMERICA, DATED 1/14/2011

Assignor

KEY ENERGY SERVICES, LLC

Exec Dt:

01/14/2011

Assignee

BANK OF AMERICA NATIONAL ASSOCIATION

231 SOUTH LASALLE ST.

CHICAGO, ILLINOIS 60697

Properties

Pat #

Pub #

Intl #

App #

Pat #

Pub #

Intl #

App #

8684096

US20100252278

12592026

8453729

US20100252252

12658226

Correspondence name and address
	CONSTANCE G. RHEBERGEN
	P. O. BOX 61389
	HOUSTON, TX 77208-1389

Assignment: 6

Reel/Frame:	029572/0162			Pages:	19
		Recorded:	01/04/2013
Attorney Dkt #:	BTHO-0001
Conveyance:	AGREEMENT FOR REPURCHASE OF TECHNOLOGY AND MODIFICATION OF PRIOR AGREEMENTS

Assignor

KEY ENERGY SERVICES, LLC

Exec Dt:

12/21/2012

Assignee

GRANBURY THOMPSON GROUP, LLC

1315 WATERS EDGE DRIVE, SUITE 113

GRANBURY, TEXAS 76048

Property

Pat #

Pub #

Intl #

App #

8449779

US20110215058

12685549

Correspondence name and address
	HITT GAINES P.C.
	P.O. BOX 832570
	RICHARDSON, TX 75083

Assignment: 7

Reel/Frame:	035801/0073			Pages:	22
		Recorded:	06/01/2015
Conveyance:	SECURITY INTEREST (SEE DOCUMENT FOR DETAILS).

Assignor

KEY ENERGY SERVICES, LLC

Exec Dt:

06/01/2015

Assignee

CORTLAND CAPITAL MARKET SERVICES LLC, AS AGENT

225 W. WASHINGTON STREET

21ST FLOOR

CHICAGO, ILLINOIS 60606

Properties

Pat #	Pub #	Intl #	App #	Pat #	Pub #	Intl #	App #	Pat #	Pub #	Intl #	App #
5711382	NONE		08506955	5988299	NONE		08623041	6079490	NONE		09058477
6168054	NONE		09200490	6377189	NONE		09281864	6212763	NONE		09342564
6276449	NONE		09533511	6253849	NONE		09534599	6209639	NONE		09534601
6213207	NONE		09535239	6241020	NONE		09535555	6164493	NONE		09566166
6533519	NONE		09620580	6374706	NONE		09768551	6728638	US20020156582		09838857
6826492	US20020156591		09839444	6578634	US20030042020		09945924	6758095	US20030188584		10046688
7006009	US20030183382		10113609	7004456	US20040065874		10263630	6898983	US20040089076		10292715
6719515	US20030147726		10389026	7064677	US20030196798		10440633	7221155	US20040196032		10760650
7029422	US20040192507		10778835	7228899	US20040188088		10778846	6969223	US20040197166		10818575
7066266	US20050230117		10826783	7226037	US20060163545		10925813	7461830	US20050114001		10942730
7006920	US20050103491		10957309	7114577	US20050199388		11066576	7273104	US20060021753		11161185
7359801	US20070056746		11516105	7519508	US20070067107		11516153	7519475	US20070089878		11517919
7513338	US20070056811		11517920	7588083	US20080035333		11690483	7571054	US20080035334		11690904
7672785	US20080035335		11691031	7788054	US20070227225		11691163	7518526	US20080037368		11691219
7657376	US20070288169		11827052	7793918	US20090057630		11850391	7917293	US20090063054		11850398
7631563	US20090056467		11850405	8684096	US20100252278		12592026	8590401	US20100132180		12627529
8280639	US20100138159		12627542	8453729	US20100252252		12658226	8280636	US20110214856		13051590
8589036	US20110313626		13161736	NONE	US20120109526		13283473	9057227	US20130266404		13815526
9027416	US20140174731		14050197	9458683	US20140151021		14083978	9562406	US20140138081		14083996
9470050	US20140140791		14084017	9611707	US20140138080		14084040	9657538	US20140138100		14084089
9605498	US20140140790		14084206

Correspondence name and address
	LINDA R. KASTNER
	330 NORTH WABASH AVENUE
	SUITE 2800
	CHICAGO, IL 60606

Assignment: 8

Reel/Frame:	036284/0840			Pages:	22
		Recorded:	08/06/2015
Conveyance:	CORRECTIVE ASSIGNMENT TO CORRECT THE ASSIGNOR NAME PREVIOUSLY RECORDED AT REEL: 035814 FRAME: 0158. ASSIGNOR(S) HEREBY CONFIRMS THE SECURITY INTEREST.

Assignor

KEY ENERGY SERVICES, LLC

Exec Dt:

06/01/2015

Assignee

BANK OF AMERICA, N.A., AS ADMINISTRATIVE AGENT

901 MAIN STREET

11TH FLOOR, TX1-492-11-23

DALLAS, TEXAS 75202

Properties

Pat #	Pub #	Intl #	App #	Pat #	Pub #	Intl #	App #	Pat #	Pub #	Intl #	App #
5711382	NONE		08506955	5988299	NONE		08623041	6079490	NONE		09058477
6168054	NONE		09200490	6377189	NONE		09281864	6212763	NONE		09342564
6276449	NONE		09533511	6253849	NONE		09534599	6209639	NONE		09534601
6213207	NONE		09535239	6241020	NONE		09535555	6164493	NONE		09566166
6533519	NONE		09620580	6374706	NONE		09768551	6728638	US20020156582		09838857
6826492	US20020156591		09839444	6578634	US20030042020		09945924	6758095	US20030188584		10046688
7006009	US20030183382		10113609	7004456	US20040065874		10263630	6898983	US20040089076		10292715
6719515	US20030147726		10389026	7064677	US20030196798		10440633	7221155	US20040196032		10760650
7029422	US20040192507		10778835	7228899	US20040188088		10778846	6969223	US20040197166		10818575
7066266	US20050230117		10826783	7226037	US20060163545		10925813	7461830	US20050114001		10942730
7006920	US20050103491		10957309	7114577	US20050199388		11066576	7273104	US20060021753		11161185
7359801	US20070056746		11516105	7519508	US20070067107		11516153	7519475	US20070089878		11517919
7513338	US20070056811		11517920	7588083	US20080035333		11690483	7571054	US20080035334		11690904
7672785	US20080035335		11691031	7788054	US20070227225		11691163	7518526	US20080037368		11691219
7657376	US20070288169		11827052	7793918	US20090057630		11850391	7917293	US20090063054		11850398
7631563	US20090056467		11850405	8684096	US20100252278		12592026	8590401	US20100132180		12627529
8280639	US20100138159		12627542	8453729	US20100252252		12658226	8280636	US20110214856		13051590
8589036	US20110313626		13161736	NONE	US20120109526		13283473	9057227	US20130266404		13815526
9027416	US20140174731		14050197	9458683	US20140151021		14083978	9562406	US20140138081		14083996
9470050	US20140140791		14084017	9611707	US20140138080		14084040	9657538	US20140138100		14084089
9605498	US20140140790		14084206

Correspondence name and address
	LINDA R. KASTNER, C/O LATHAM & WATKINS
	330 NORTH WABASH AVENUE
	SUITE 2800
	CHICAGO, IL 60611

Assignment: 9

Reel/Frame:	038895/0502			Pages:	5
		Recorded:	06/06/2016
Attorney Dkt #:	SLGB:007
Conveyance:	NUNC PRO TUNC ASSIGNMENT (SEE DOCUMENT FOR DETAILS).

Assignor

KEY ENERGY SERVICES, LLC

Exec Dt:

06/03/2016

Assignee

SCHLUMBERGER TECHNOLOGY CORPORATION

14910 AIRLINE DRIVE

ROSHARON, TEXAS 77583

Properties

Pat #

Pub #

Intl #

App #

Pat #

Pub #

Intl #

App #

Pat #

Pub #

Intl #

App #

8684096

US20100252278

12592026

8453729

US20100252252

12658226

9303477

US20130180715

13506227

Correspondence name and address
	KEITH B. WILLHELM
	351 N. POST OAK LANE - SUITE 712
	HOUSTON, TX 77024

Assignment: 10

Reel/Frame:	040965/0383			Pages:	25
		Recorded:	12/15/2016
Attorney Dkt #:	F167254
Conveyance:	SECURITY INTEREST (SEE DOCUMENT FOR DETAILS).

Assignor

KEY ENERGY SERVICES, LLC

Exec Dt:

12/15/2016

Assignee

CORTLAND PRODUCTS CORP., AS AGENT

225 W. WASHINGTON STREET, 21ST FLOOR

CHICAGO, ILLINOIS 60606

Properties

Pat #	Pub #	Intl #	App #	Pat #	Pub #	Intl #	App #	Pat #	Pub #	Intl #	App #
6079490	NONE		09058477	6168054	NONE		09200490	6377189	NONE		09281864
6212763	NONE		09342564	6276449	NONE		09533511	6253849	NONE		09534599
6209639	NONE		09534601	6213207	NONE		09535239	6241020	NONE		09535555
6164493	NONE		09566166	6533519	NONE		09620580	6374706	NONE		09768551
6728638	US20020156582		09838857	6826492	US20020156591		09839444	6578634	US20030042020		09945924
6758095	US20030188584		10046688	7006009	US20030183382		10113609	7004456	US20040065874		10263630
6898983	US20040089076		10292715	6719515	US20030147726		10389026	7064677	US20030196798		10440633
7221155	US20040196032		10760650	7029422	US20040192507		10778835	7228899	US20040188088		10778846
6969223	US20040197166		10818575	7066266	US20050230117		10826783	7226037	US20060163545		10925813
7461830	US20050114001		10942730	7006920	US20050103491		10957309	7114577	US20050199388		11066576
7273104	US20060021753		11161185	7359801	US20070056746		11516105	7519508	US20070067107		11516153
7519475	US20070089878		11517919	7513338	US20070056811		11517920	7588083	US20080035333		11690483
7571054	US20080035334		11690904	7672785	US20080035335		11691031	7788054	US20070227225		11691163
7518526	US20080037368		11691219	7657376	US20070288169		11827052	7793918	US20090057630		11850391
7917293	US20090063054		11850398	7631563	US20090056467		11850405	8590401	US20100132180		12627529
8280639	US20100138159		12627542	8280636	US20110214856		13051590	8589036	US20110313626		13161736
NONE	US20120109526		13283473	9057227	US20130266404		13815526	9027416	US20140174731		14050197
9458683	US20140151021		14083978	9562406	US20140138081		14083996	9470050	US20140140791		14084017
9611707	US20140138080		14084040	9657538	US20140138100		14084089	9605498	US20140140790		14084206
9879487	US20140216735		14172637

Correspondence name and address
	JOANNA MCCALL
	1025 VERMONT AVE NW, SUITE 1130
	NATIONAL CORPORATE RESEARCH, LTD
	WASHINGTON, DC 20005

Assignment: 11

Reel/Frame:	040989/0070			Pages:	26
		Recorded:	12/15/2016
Attorney Dkt #:	049268-0074
Conveyance:	SECURITY INTEREST (SEE DOCUMENT FOR DETAILS).

Assignor

KEY ENERGY SERVICES, LLC

Exec Dt:

12/15/2016

Assignee

BANK OF AMERICA, N.A., AS ADMINISTRATIVE AGENT

901 MAIN STREET, 11TH FLOOR, TX1-492-11-23

DALLAS, TEXAS 75202

Properties

Pat #	Pub #	Intl #	App #	Pat #	Pub #	Intl #	App #	Pat #	Pub #	Intl #	App #
6079490	NONE		09058477	6168054	NONE		09200490	6377189	NONE		09281864
6212763	NONE		09342564	6276449	NONE		09533511	6253849	NONE		09534599
6209639	NONE		09534601	6213207	NONE		09535239	6241020	NONE		09535555
6164493	NONE		09566166	6533519	NONE		09620580	6374706	NONE		09768551
6728638	US20020156582		09838857	6826492	US20020156591		09839444	6578634	US20030042020		09945924
6758095	US20030188584		10046688	7006009	US20030183382		10113609	7004456	US20040065874		10263630
6898983	US20040089076		10292715	6719515	US20030147726		10389026	7064677	US20030196798		10440633
7221155	US20040196032		10760650	7029422	US20040192507		10778835	7228899	US20040188088		10778846
6969223	US20040197166		10818575	7066266	US20050230117		10826783	7226037	US20060163545		10925813
7461830	US20050114001		10942730	7006920	US20050103491		10957309	7114577	US20050199388		11066576
7273104	US20060021753		11161185	7359801	US20070056746		11516105	7519508	US20070067107		11516153
7519475	US20070089878		11517919	7513338	US20070056811		11517920	7588083	US20080035333		11690483
7571054	US20080035334		11690904	7672785	US20080035335		11691031	7788054	US20070227225		11691163
7518526	US20080037368		11691219	7657376	US20070288169		11827052	7793918	US20090057630		11850391
7917293	US20090063054		11850398	7631563	US20090056467		11850405	8590401	US20100132180		12627529
8280639	US20100138159		12627542	8280636	US20110214856		13051590	8589036	US20110313626		13161736
NONE	US20120109526		13283473	9057227	US20130266404		13815526	9027416	US20140174731		14050197
9458683	US20140151021		14083978	9562406	US20140138081		14083996	9470050	US20140140791		14084017
9611707	US20140138080		14084040	9657538	US20140138100		14084089	9605498	US20140140790		14084206
9879487	US20140216735		14172637