Patent Assignment
Reel/Frame 010165/0582
Corrective Assignment to Correct the Assignee's Name, Filed 8-28-98 Recorded on Reel 9435 Frame 0701 Assignor Hereby Confirms the Assignment of the Entire Interest
Recorded: 1999-07-21
Pages: 5
Assignors
BLANKINSHIP, THOMAS J.
Executed: 1998-08-24
ROBERTS, EDWIN K.
Executed: 1998-08-24
TELLO, LUCIO N.
Executed: 1998-08-24
Assignee
COMPUTALOG RESEARCH, INC.
500 WINSCOTT ROAD, FORT WORTH, TEXAS, 76126
Covered Property
(1)
Method and Apparatus for Acoustic Logging of Fluid Density and Wet Cement Plugs in Boreholes
Patent:
6,050,141 →
Application:
09/141,796 →
Related Assignments
(7)
Other recorded transfers of the patent in this record — the chain of ownership.
Assignment of Assignor's Interest
Aug 28, 1998
From: BLANKINSHIP, THOMAS J.; ROBERTS, EDWIN K.; TELLO, LUCIO N.
To: INTERNATIONAL BUSINESS MACHINES CORPORATION
Reel/Frame 009435/0701 →
Assignment of Assignor's Interest
Apr 12, 2005
From: COMPUTALOG RESEARCH, INC.
To: COMPUTALOG USA, INC.
Reel/Frame 016446/0373 →
Change of Name
Jul 1, 2005
From: COMPUTALOG LTD.
To: PRECISION DRILLING TECHNOLOGY SERVICES GROUP, INC.
Reel/Frame 017275/0188 →
Change of Name
Aug 3, 2005
From: PRECISION DRILLING TECHNOLOGY SERVICES GROUP, INC.
To: PRECISION ENERGY SERVICES, LTD.
Reel/Frame 016345/0078 →
Change of Name
Feb 7, 2006
From: COMPUTALOG LTD.
To: PRECISION DRILLING TECHNOLOGY SERVICES GROUP, INC.
Reel/Frame 017230/0980 →
Assignment of Assignor's Interest
Apr 21, 2006
From: PRECISION ENERGY SERVICES LTD.
To: PRECISION ENERGY SERVICES ULC
Reel/Frame 017507/0031 →
Assignment of Assignor's Interest
Apr 26, 2006
From: PRECISION ENERGY SERVICES ULC
To: WEATHERFORD CANADA PARTNERSHIP
Reel/Frame 017527/0191 →