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Patent Assignment Abstract of Title
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Total Assignments: 6
Patent #:
4730681
Issue Dt:
03/15/1988
Application #:
06902463
Filing Dt:
08/29/1986
Inventor:
ROY D. ESTES
Title:
ROCK BIT CONE LOCK AND METHOD
Assignment: 1
Reel/Frame:
004597/0209Recorded: 08/29/1986Pages: 2
Conveyance:
ASSIGNMENT OF ASSIGNORS INTEREST.
Assignor:
ESTES, ROY D.
Exec Dt:
08/22/1986
Assignee:
ROCK BIT INDUSTRIES U.S.A., INC., A CORP. OF TX.
FORT WORTH, TEXAS
Correspondent:
L. DAN TUCKER
HUBBARD, THURMAN, TURNER & TUCKER
2100 ONE GALLERIA TOWER
DALLAS, TX 75240-6604
Assignment: 2
Reel/Frame:
016263/0203Recorded: 07/14/2005Pages: 11
Conveyance:
SECURITY AGREEMENT
Assignors:
ROCKBIT INTERNATIONAL, L.P., A TEXAS LIMITED PARTNERSHIP
Exec Dt:
05/10/2005
PDC-GEARHART INTERNATIONAL, INC., A TEXAS CORPORATION
Exec Dt:
05/10/2005
NO-DRIFT TECH SYSTEMS, L.P., A TEXAS LIMITED PARTNERSHIP
Exec Dt:
05/10/2005
Assignee:
PNC BANK, N.A., A NATIONAL BANKING ASSOCIATION
2121 SAN JACINTO
SUITE 1850
DALLAS, TEXAS 75201
Correspondent:
DARREN W. COLLINS
2001 ROSS AVENUE
SUITE 3000; PATTON BOGGS, LLP
DALLAS, TX 75201
Assignment: 3
Reel/Frame:
020571/0601Recorded: 02/28/2008Pages: 10
Conveyance:
ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS).
Assignor:
ULTERRA DRILLING TECHNOLOGIES, L.P.
Exec Dt:
12/20/2007
Assignee:
GENERAL ELECTRIC CAPITAL CORPORATION
120 LONG RIDGE RD
STAMFORD, CONNECTICUT 06927
Correspondent:
KATHLEEN E. CAULFIELD
2020 K ST. NW
WASHINGTON, DC 20006
Assignment: 4
Reel/Frame:
025822/0903Recorded: 02/16/2011Pages: 8
Conveyance:
ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS).
Assignor:
ULTERRA DRILLING TECHNOLOGIES, L.P.
Exec Dt:
03/09/2010
Assignee:
BURINTEKH USA LLC
7601 WILL ROGERS BOULEVARD
FORT WORTH, TEXAS 76140
Correspondent:
ROBERT C. SHADDOX
WINSTEAD PC
P.O. BOX 50784
DALLAS, TX 75201
Assignment: 5
Reel/Frame:
026328/0975Recorded: 05/24/2011Pages: 6
Conveyance:
RELEASE BY SECURED PARTY (SEE DOCUMENT FOR DETAILS).
Assignor:
PNC BANK, NATIONAL ASSOCIATION
Exec Dt:
05/24/2011
Assignee:
ULTERRA DRILLING TECHNOLOGIES, LP, FKA ROCKBIT INTERNATIONAL LP, SUCCESSOR BY MERGER TO PDC GEARHART INTERNATIONAL, INC.
420 THROCKMORTON, SUITE 1110
FORT WORTH, TEXAS 76102
Correspondent:
BRETT T. COOKE, ESQ./ANDREWS KURTH LLP
600 TRAVIS, SUITE 4200
HOUSTON, TX 77002
Assignment: 6
Reel/Frame:
026430/0658Recorded: 06/13/2011Pages: 9
Conveyance:
RELEASE BY SECURED PARTY (SEE DOCUMENT FOR DETAILS).
Assignor:
GENERAL ELECTRIC CAPITAL CORPORATION
Exec Dt:
06/08/2011
Assignees:
ULTERRA DRILLING TECHNOLOGIES, L.P.
420 THROCKMORTON STREET
SUITE 1110
FORT WORTH, TEXAS 76102
ULTERRA, LP
7010-45 STREET
LEDUC, ALBERTA, CANADA T9E 7E7
Correspondent:
SOLYN J. LEE
JONES DAY
222 EAST 41 STREET
NEW YORK, NY 10017

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