Patent Assignment
Reel/Frame 012056/0732
Assignment of Assignor's Interest
Recorded: 2001-08-06
Pages: 3
Assignor
MALLIS, DAVID LLEWELLYN
Executed: 2001-08-02
Assignee
HYDRIL COMPANY
3300 NORTH SAM HOUSTON PARKWAY EAST, HOUSTON, TEXAS, 77032
Covered Property
(1)
Double Flex Seal for Tubular Connection
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 →