Patent Assignment
Reel/Frame 019308/0377
Corrective Assignment to Correct Tyographical Error in the First Applicant's Name Previously Recorded at R/F 018809/0983.
Recorded: 2007-05-11
Pages: 22
Assignors
HEMPHILL, EDWARD RYAN
Executed: 2007-01-19
BERCKENHOFF, MICHAEL WAYNE
Executed: 2007-01-15
Assignee
HYDRIL COMPANY LP
3300 NORTH SAM HOUSTON PARKWAY EAST, HOUSTON, TEXAS, 77032
Covered Property
(1)
Mounts for Blowout Preventer Bonnets
Related Assignments
(4)
Other recorded transfers of the patent in this record — the chain of ownership.
Assignment of Assignor's Interest
Jan 26, 2007
From: HEMPHIL, EDWARD RYAN; BERCKENHOFF, MICHAEL WAYNE
To: HYDRIL COMPANY LP
Reel/Frame 018809/0983 →
Merger
Mar 28, 2008
From: HYDRIL COMPANY LP
To: HYDRIL GENERAL LLC
Reel/Frame 020710/0717 →
Change of Name
Mar 28, 2008
From: HDRYIL GENERAL LLC
To: HYDRIL LLC
Reel/Frame 020710/0950 →
Assignment of Assignor's Interest
Jun 5, 2008
From: HYDRIL LLC
To: HYDRIL USA MANUFACTURING LLC
Reel/Frame 021050/0491 →