IP Library › Assignment 021880/0941
Patent Assignment
Reel/Frame 021880/0941

Assignment of Assignor's Interest

Recorded: 2008-11-24 Pages: 3
Assignors
MCELHINNEY, GRAHAM
Executed: 2006-08-16
CEH, LEON
Executed: 2006-08-16
Assignee
PATHFINDER ENERGY SERVICES, INC.
15151 SOMMERMEYER ST., HOUSTON, TEXAS, 77041
Covered Property (1)
Transverse Magnetization of Casing String Tubulars
Patent: 7,712,519 →
Application: 10/536,124 →
Publication: US 2009/0173504
Related Assignments (2)
Other recorded transfers of the patent in this record — the chain of ownership.
Assignment of Assignor's Interest Feb 10, 2009
From: PATHFINDER ENERGY SERVICES, INC.
To: SMITH INTERNATIONAL, INC.
Reel/Frame 022231/0733 →
Assignment of Assignor's Interest Oct 17, 2012
From: SMITH INTERNATIONAL, INC.
To: SCHLUMBERGER TECHNOLOGY CORPORATION
Reel/Frame 029143/0015 →