Patent Assignment
Reel/Frame 006680/0567
Assignment of Assignor's Interest
Recorded: 1993-09-07
Pages: 3
Assignor
BAKER HUGHES OILFIELD OPERATIONS, INC.
Executed: 1993-08-12
Assignee
ENERPRO INTERNATIONAL, INC.
17015 ALDINE WESTFIELD, HOUSTON, TEXAS, 77073-5198
Covered Properties
(5)
Apparatus and Method for the Mechanical Sequential Release of Cementing Plugs
Patent:
4,345,651 →
Application:
06/133,363 →
Unitary Float Valve and Wiping Plug Retainer
Patent:
4,442,894 →
Application:
06/385,615 →
Method and Apparatus for Well Cementing Through a Tubular Member
Patent:
4,450,912 →
Application:
06/385,616 →
Well Conduit Centralizer
Patent:
4,531,582 →
Application:
06/547,408 →
Segmented Concentric Centralizer
Patent:
4,641,776 →
Application:
06/765,798 →
Related Assignments
(11)
Other recorded transfers of the patents in this record — the chain of ownership.
Assignment of Assignors Interest.
Jun 7, 1982
From: CALLIHAN, RUDY B.; WAINWRIGHT, CLYDE
To: BAKER OIL TOOLS, INC.
Reel/Frame 004012/0853 →
Assignment of Assignors Interest.
Jun 7, 1982
From: CALLIHAN, RUDY B.; STONE, LYNDON R.
To: BAKER OIL TOOLS, INC. 500 CITY PARKWAY, WEST, ORANGE, CA 92668 A CORP. OF CA
Reel/Frame 004006/0894 →
Assignment of Assignors Interest.
Oct 31, 1983
From: MUSE, JOHN F.; RIDDLE, HARRY W.; ZEILER, FRANK S.; BURUATO, JUVENTINO
To: BAKER OIL TOOLS, INC., A CORP OF CA
Reel/Frame 004191/0885 →
Merger
Jul 15, 1993
From: BAKER HUGHES PRODUCTION TOOLS, INC.
To: BAKER HUGHES DRILLING TECHNOLOGIES, INC.
Reel/Frame 006680/0830 →
Change of Name
Jul 15, 1993
From: BAKER HUGHES PRODUCTION TOOLS, INC.
To: BAKER HUGHES INTEQ, INC.
Reel/Frame 006680/0849 →
Change of Name
Jul 15, 1993
From: BAKER OIL TOOLS, INC.
To: BAKER HUGHES PRODUCTION TOOLS, INC.
Reel/Frame 006608/0588 →
Change of Name
Jul 15, 1993
From: BAKER INTERNATIONAL CORPORATION
To: BAKER OIL TOOLS, INC.
Reel/Frame 006680/0792 →
Change of Name
Jul 15, 1993
From: BAKER OIL TOOLS, INC.
To: BAKER HUGHES PRODUCTION TOOLS, INC.
Reel/Frame 006680/0811 →
Assignment of Assignor's Interest
Sep 14, 1993
From: ENERPRO INTERNATIONAL, INC.
To: FIRST INTERSTATE BANK OF TEXAS, N.A.
Reel/Frame 006705/0467 →
Release of Security Interest
May 17, 1996
From: FIRST INTERSTATE BANK OF TEXAS, N.A.
To: ENERPRO INTERNATIONAL, INC.
Reel/Frame 007945/0859 →
Release of Lien
Aug 13, 1996
From: FIRST INTERSTATE BANK OF TEXAS, N.A.
To: ENERPRO INTERNATIONAL, INC.
Reel/Frame 008077/0049 →