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Reel/Frame:020325/0209   Pages: 10
Recorded: 01/07/2008
Attorney Dkt #:KEY ENERGY SERVICES DEAL
Conveyance: RELEASE BY SECURED PARTY (SEE DOCUMENT FOR DETAILS).
Total properties: 36
1
Patent #:
5297631
Issue Dt:
03/29/1994
Application #:
08044187
Filing Dt:
04/07/1993
Title:
METHOD AND APPARATUS FOR DOWNHOLE OIL WELL PRODUCTION STIMULATION
2
Patent #:
5439066
Issue Dt:
08/08/1995
Application #:
08266011
Filing Dt:
06/27/1994
Title:
METHOD AND SYSTEM FOR DOWNHOLE REDIRECTION OF A BOREHOLE
3
Patent #:
5711382
Issue Dt:
01/27/1998
Application #:
08506955
Filing Dt:
07/26/1995
Title:
AUTOMATED OIL RIG SERVICING SYSTEM
4
Patent #:
5988299
Issue Dt:
11/23/1999
Application #:
08623041
Filing Dt:
03/28/1996
Title:
AUTOMATED OIL RIG SERVICING SYSTEM
5
Patent #:
6079490
Issue Dt:
06/27/2000
Application #:
09058477
Filing Dt:
04/10/1998
Title:
REMOTELY ACCESSIBLE MOBILE REPAIR UNIT FOR WELLS
6
Patent #:
6168054
Issue Dt:
01/02/2001
Application #:
09200490
Filing Dt:
11/25/1998
Title:
OIL RECOVERY SYSTEM AND APPARATUS
7
Patent #:
6377189
Issue Dt:
04/23/2002
Application #:
09281864
Filing Dt:
03/31/1999
Title:
OIL WELL SERVICING SYSTEM
8
Patent #:
6212763
Issue Dt:
04/10/2001
Application #:
09342564
Filing Dt:
06/29/1999
Title:
TORQUE-TURN SYSTEM FOR A THREE-ELEMENT SUCKER ROD JOINT
9
Patent #:
6276449
Issue Dt:
08/21/2001
Application #:
09533511
Filing Dt:
03/23/2000
Title:
Engine speed control for hoist and tongs
10
Patent #:
6253849
Issue Dt:
07/03/2001
Application #:
09534599
Filing Dt:
03/27/2000
Title:
Method of distinguishing the raising and lowering of tubing and sucker rods
11
Patent #:
6209639
Issue Dt:
04/03/2001
Application #:
09534601
Filing Dt:
03/27/2000
Title:
METHOD OF ENSURING THAT WELL TUBING WAS PROPERLY STRETCHED
12
Patent #:
6213207
Issue Dt:
04/10/2001
Application #:
09535239
Filing Dt:
03/27/2000
Title:
Method of distinguishing between installing different sucker rods
13
Patent #:
6241020
Issue Dt:
06/05/2001
Application #:
09535555
Filing Dt:
03/27/2000
Title:
METHOD OF RECORDING A CROSS-LOAD ON A MOBILE REPAIR UNIT FOR A WELL
14
Patent #:
6164493
Issue Dt:
12/26/2000
Application #:
09566166
Filing Dt:
05/05/2000
Title:
Oil recovery method
15
Patent #:
6374706
Issue Dt:
04/23/2002
Application #:
09768551
Filing Dt:
01/25/2001
Title:
SUCKER ROD TOOL
16
Patent #:
6728638
Issue Dt:
04/27/2004
Application #:
09838857
Filing Dt:
04/23/2001
Publication #:
US20020156582
Pub Dt:
10/24/2002
Title:
METHOD OF MONITORING OPERATIONS OF MULTIPLE SERVICE VEHICLES AT A WELL SITE
17
Patent #:
NONE
Issue Dt:
Application #:
09839080
Filing Dt:
04/23/2001
Publication #:
US20020153134
Pub Dt:
10/24/2002
Title:
Method of managing work orders at a well site
18
Patent #:
NONE
Issue Dt:
Application #:
09839103
Filing Dt:
04/23/2001
Publication #:
US20020156730
Pub Dt:
10/24/2002
Title:
Method of managing billing information at a well site
19
Patent #:
NONE
Issue Dt:
Application #:
09839411
Filing Dt:
04/23/2001
Publication #:
US20020156670
Pub Dt:
10/24/2002
Title:
Method of managing workers at a well site
20
Patent #:
6826492
Issue Dt:
11/30/2004
Application #:
09839444
Filing Dt:
04/23/2001
Publication #:
US20020156591
Pub Dt:
10/24/2002
Title:
METHOD OF MANAGING A WELL FILE RECORD AT A WELL SITE
21
Patent #:
6578634
Issue Dt:
06/17/2003
Application #:
09945924
Filing Dt:
09/05/2001
Publication #:
US20030042020
Pub Dt:
03/06/2003
Title:
METHOD OF MONITORING PUMPING OPERATIONS OF A SERVICE VEHICLE AT A WELL SITE
22
Patent #:
6758095
Issue Dt:
07/06/2004
Application #:
10046688
Filing Dt:
01/16/2002
Publication #:
US20030188584
Pub Dt:
10/09/2003
Title:
TONGS MONITOR WITH LEARNING MODE
23
Patent #:
7006009
Issue Dt:
02/28/2006
Application #:
10113609
Filing Dt:
04/01/2002
Publication #:
US20030183382
Pub Dt:
10/02/2003
Title:
SERVICING SYSTEM FOR WELLS
24
Patent #:
7004456
Issue Dt:
02/28/2006
Application #:
10263630
Filing Dt:
10/03/2002
Publication #:
US20040065874
Pub Dt:
04/08/2004
Title:
ENGINE SPEED LIMITER FOR A HOIST
25
Patent #:
6898985
Issue Dt:
05/31/2005
Application #:
10397796
Filing Dt:
03/25/2003
Title:
METHOD OF DETERMINING THE NORMAL EVAPORATION RATE (NER) AND VACUUM QUALITY OF A CRYOGENIC LIQUID CONTAINER
26
Patent #:
NONE
Issue Dt:
Application #:
10437673
Filing Dt:
05/14/2003
Publication #:
US20040226712
Pub Dt:
11/18/2004
Title:
Portable memory device for mobile workover rig
27
Patent #:
7064677
Issue Dt:
06/20/2006
Application #:
10440633
Filing Dt:
05/19/2003
Publication #:
US20030196798
Pub Dt:
10/23/2003
Title:
METHOD OF MONITORING SERVICE OPERATIONS OF A SERVICE VEHICLE AT A WELL SITE
28
Patent #:
NONE
Issue Dt:
Application #:
10720594
Filing Dt:
11/24/2003
Publication #:
US20040162658
Pub Dt:
08/19/2004
Title:
Crown out-floor out device for a well service rig
29
Patent #:
7221155
Issue Dt:
05/22/2007
Application #:
10760650
Filing Dt:
01/20/2004
Publication #:
US20040196032
Pub Dt:
10/07/2004
Title:
INVENTORY COUNTER FOR OIL AND GAS WELLS
30
Patent #:
7029422
Issue Dt:
04/18/2006
Application #:
10778835
Filing Dt:
02/13/2004
Publication #:
US20040192507
Pub Dt:
09/30/2004
Title:
ERGONOMICS SAFETY WARNING DEVICE AND METHOD TO PREVENT CLUTCH BURNING
31
Patent #:
7228899
Issue Dt:
06/12/2007
Application #:
10778846
Filing Dt:
02/13/2004
Publication #:
US20040188088
Pub Dt:
09/30/2004
Title:
WARNING DEVICE AND METHOD TO PREVENT CLUTCH BURNING
32
Patent #:
7226037
Issue Dt:
06/05/2007
Application #:
10925813
Filing Dt:
08/25/2004
Publication #:
US20060163545
Pub Dt:
07/27/2006
Title:
SYSTEM FOR ASSURING ENGAGEMENT OF A HYDROMATIC BRAKE ON A DRILLING OR WELL SERVICE RIG
33
Patent #:
7461830
Issue Dt:
12/09/2008
Application #:
10942730
Filing Dt:
09/16/2004
Publication #:
US20050114001
Pub Dt:
05/26/2005
Title:
MULTIPLE SENSOR FOR PREVENTING A CROWN-BLOCK INCURSION ON AN OIL WELL RIG
34
Patent #:
7006920
Issue Dt:
02/28/2006
Application #:
10957309
Filing Dt:
10/01/2004
Publication #:
US20050103491
Pub Dt:
05/19/2005
Title:
ACTIVITY DATA CAPTURE SYSTEM FOR A WELL SERVICE VEHICLE
35
Patent #:
7114577
Issue Dt:
10/03/2006
Application #:
11066576
Filing Dt:
02/25/2005
Publication #:
US20050199388
Pub Dt:
09/15/2005
Title:
SAFEMODE OPERATING SYSTEM FOR A DRILLING OR SERVICE RIG
36
Patent #:
NONE
Issue Dt:
Application #:
11087366
Filing Dt:
03/23/2005
Publication #:
US20050252279
Pub Dt:
11/17/2005
Title:
Apparatus and methodology of hydrostatically testing of oil field tubing and casing
Assignor
1
LEHMAN COMMERCIAL PAPER, INC.
Exec Dt:
11/28/2007
Assignee
1
KEY ENERGY SERVICES, INC.
1301 MCKINNEY STREET
SUITE 1800
HOUSTON, TEXAS 77010
Correspondence name and address
BRACEWELL AND GIULIANI, LLP
711 LOUISIANA STREET, SUITE 2300
INTELLECTUAL PROPERTY GROUP
HOUSTON, TX 77002

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