Assignment of Assignor's Interest

Recorded: 2003-07-24 Pages: 2

Assignors

TUTNCU, AZRA NUR

Executed: 2003-06-23

HALE, ARTHUR HERMAN

Executed: 2003-06-23

Assignee

SHELL OIL COMPANY

P.O. BOX 2463, 900 LOUISIANA, HOUSTON, TEXAS, 77252-2463

Covered Property (1)

Method of Freeing Stuck Drill Pipe

Patent: 6,845,818 →

Application: 10/425,512 →

Publication: US 2004/0216880