Patent Assignment
Reel/Frame 006608/0588
Change of Name
Recorded: 1993-07-15
Pages: 16
Assignor
BAKER OIL TOOLS, INC.
Executed: 1987-08-27
Assignee
BAKER HUGHES PRODUCTION TOOLS, INC.
3900 ESSEX LANE, #800, HOUSTON, TEXAS, 77027
Covered Properties
(4)
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
(7)
Other recorded transfers of the patents in this record — the chain of ownership.
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.
Jun 7, 1982
From: CALLIHAN, RUDY B.; WAINWRIGHT, CLYDE
To: BAKER OIL TOOLS, INC.
Reel/Frame 004012/0853 →
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 →
Assignment of Assignor's Interest
Sep 7, 1993
From: BAKER HUGHES OILFIELD OPERATIONS, INC.
To: ENERPRO INTERNATIONAL, INC.
Reel/Frame 006680/0567 →
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 →