Patent Assignment
Reel/Frame 016446/0373
Assignment of Assignor's Interest
Recorded: 2005-04-12
Pages: 12
Assignor
COMPUTALOG RESEARCH, INC.
Executed: 1991-07-01
Assignee
COMPUTALOG USA, INC.
363 N. SAM HOUSTON PARKWAY EAST, SUITE 1700, HOUSTON, TEXAS, 77060
Covered Properties
(7)
Multiple Transmit Frequency Induction Logging System with Closed Loop Conversion Circuitry for Phase and Gain Variation Elimination
Patent:
5,500,597 →
Application:
08/099,621 →
Formation Density Measurement Utilizing Pulsed Neutrons
Patent:
5,900,627 →
Application:
08/878,545 →
Data Aquisition and Reduction Method for Multi-Component Flow
Patent:
6,028,307 →
Application:
08/939,247 →
Inferential Measurement of Photoelectric Absorption Cross-Section of Geologic Formations from Neutron-Induced, Gamma-Ray Spectroscopy
Patent:
6,150,655 →
Application:
09/036,287 →
Method and Apparatus for Acoustic Logging of Fluid Density and Wet Cement Plugs in Boreholes
Patent:
6,050,141 →
Application:
09/141,796 →
Method and Apparatus for Acoustic Logging of Fluid Density and Wet Cement Plugs in Boreholes
Patent:
6,189,383 →
Application:
09/329,215 →
Method and Apparatus for Acoustic Logging of Fluid Density and Wet Cement Plugs in Boreholes
Patent:
6,538,958 →
Application:
09/443,409 →
Related Assignments
(6)
Other recorded transfers of the patents in this record — the chain of ownership.
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 →
Merger
Feb 7, 2006
From: COMPUTALOG U.S.A., INC.
To: PRECISION ENERGY SERVICES, INC.
Reel/Frame 017230/0977 →
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 →