IP Library › Assignment 012361/0534
Patent Assignment
Reel/Frame 012361/0534

Assignment of Assignor's Interest

Recorded: 2001-10-24 Pages: 3
Assignor
SIVLEY, ROBERT S., IV
Executed: 2001-10-17
Assignee
HYDRIL COMPANY
3300 NORTH SAM HOUSTON PARKWAY EAST, HOUSTON, TEXAS, 77032
Covered Property (1)
Apparatus and Method to Expand Casing
Patent: 6,622,797 →
Application: 10/004,179 →
Publication: US 2003/0075338
Related Assignments (3)
Other recorded transfers of the patent in this record — the chain of ownership.
Assignment of Assignor's Interest Sep 23, 2003
From: HYDRIL COMPANY
To: HYDRIL COMPANY LP
Reel/Frame 014499/0197 →
Assignment of Assignor's Interest Dec 2, 2003
From: HYDRIL COMPANY
To: HYDRIL COMPANY LP
Reel/Frame 014763/0830 →
Merger Jan 7, 2011
From: HYDRIL COMPANY LP
To: HYDRIL COMPANY
Reel/Frame 025600/0059 →