Patent Assignment
Reel/Frame 006767/0963
Assignment of Assignor's Interest
Recorded: 1993-11-18
Pages: 4
Assignor
DRILEX SYSTEMS, INC.
Executed: 1993-11-11
Assignee
MASX ENERGY SERVICES GROUP, INC.
3317 WEST 11TH STREET, HOUSTON, TEXAS, 77008
Covered Properties
(14)
High and Low Pressure Seal
Patent:
4,201,392 →
Application:
06/030,285 →
Casing Patch Seal
Patent:
4,660,863 →
Application:
06/758,370 →
Drilling Apparatus and Cutter Therefor
Patent:
4,722,615 →
Application:
06/851,828 →
Drilling Head with Bayonet Coupling
Patent:
4,754,820 →
Application:
06/875,886 →
Self-Lubricating Well Tools and Seal Elements Therefor
Patent:
4,793,424 →
Application:
07/020,260 →
Whipstock Packer Assembly
Patent:
4,765,404 →
Application:
07/037,517 →
Method and Apparatus for Setting an Underwater Drilling System
Patent:
4,759,413 →
Application:
07/037,818 →
Drilling Apparatus and Cutter
Patent:
4,865,137 →
Application:
07/186,716 →
Detonation Assembly for Explosive Wellhead Severing System
Patent:
4,909,320 →
Application:
07/258,228 →
Mud Saver Valve with Replaceable Inner Sleeve
Patent:
4,962,819 →
Application:
07/305,213 →
Mud Saver Valve with Increased Flow Check Valve
Patent:
4,955,949 →
Application:
07/305,319 →
Geothermal Wellhead Repair Unit
Patent:
4,984,636 →
Application:
07/313,688 →
Packer for Wellhead Repair Unit
Patent:
5,009,265 →
Application:
07/404,159 →
Geothermal Wellhead Repair Unit
Patent:
5,040,600 →
Application:
07/540,712 →
Related Assignments
(11)
Other recorded transfers of the patents in this record — the chain of ownership.
Assignment of Assignors Interest.
Jun 10, 1986
From: BAILEY, THOMAS F.; SHAH, NEHAL M.
To: A-Z INTERNATIONAL TOOL COMPANY.
Reel/Frame 004556/0619 →
Assignment of Assignors Interest.
Nov 23, 1987
From: BAILEY, THOMAS F.; CAMPBELL, JOHN E.
To: DRILEX SYSTEMS, INC., HOUSTON, TEXAS, A CORP.
Reel/Frame 004788/0396 →
Assignment of Assignors Interest.
Jun 8, 1988
From: BAILEY, THOMAS F.; CAMPBELL, JOHN E.
To: DRILEX SYSTEMS, INC., HOUSTON, TEXAS, A TEXAS CORP.
Reel/Frame 004886/0208 →
Change of Name
Jun 24, 1988
From: A-Z INTERNATIONAL TOOL COMPANY
To: DRILEX SYSTEMS, INC.
Reel/Frame 004911/0748 →
Change of Name Effective, 6-5-87, Texas
Jan 23, 1989
From: A-Z INTERNATIONAL TOOL COMPANY
To: DRILEX SYSTEMS, INC.
Reel/Frame 005010/0103 →
Assignment of Assignors Interest.
Jul 7, 1989
From: HEBERT, JOSEPH V.; SCHWARTZ, ROBERT J.
To: DRILEX SYSTEMS, INC., A CORP. OF TX
Reel/Frame 005129/0157 →
Assignment of Assignors Interest.
Sep 18, 1989
From: BAILEY, THOMAS F.; STRICKLAND, JAMES N.
To: DRILEX SYSTEMS, INC., HOUSTON, TX A CORP. OF TX
Reel/Frame 005140/0835 →
Assignment of Assignors Interest.
Sep 29, 1989
From: CORDS, D. PHILIP; MCBRIDE, EDWARD F.
To: E.I. DU PONT DE NEMOURS & COMPANY
Reel/Frame 005153/0459 →
Assignment of Assignors Interest.
Oct 2, 1989
From: BAILEY, THOMAS F.; TODD, RAYMOND A. JR.
To: DRILEX SYSTEMS, INC., A CORP. OF TX
Reel/Frame 005194/0801 →
Assignment of Assignors Interest.
Apr 26, 1990
From: PALMER, RICHARD LEE; BAILEY, THOMAS F.; LANCASTER, CHARLES E.
To: DRILEX SYSTEMS, INC., A CORP. OF TEXAS
Reel/Frame 005281/0324 →
Assignment of Assignor's Interest
Jan 12, 1994
From: MASX ENERGY SERVICES GROUP, INC. (A DELAWARE CORPORATION)
To: SMITH INTERNATIONAL, INC. (A DELAWARE CORPORATION)
Reel/Frame 006822/0975 →