Patent Assignment
Reel/Frame 009435/0701
Assignment of Assignor's Interest
Recorded: 1998-08-28
Pages: 2
Assignors
BLANKINSHIP, THOMAS J.
Executed: 1998-08-24
ROBERTS, EDWIN K.
Executed: 1998-08-24
TELLO, LUCIO N.
Executed: 1998-08-24
Assignee
INTERNATIONAL BUSINESS MACHINES CORPORATION
NEW ORCHARD ROAD, ARMONK, NEW YORK, 10504
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.
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
Jul 21, 1999
From: BLANKINSHIP, THOMAS J.; ROBERTS, EDWIN K.; TELLO, LUCIO N.
To: COMPUTALOG RESEARCH, INC.
Reel/Frame 010165/0582 →
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 →