Patent Assignment
Reel/Frame 022308/0491
Assignment of Assignor's Interest
Recorded: 2009-02-25
Pages: 4
Assignors
YAMAMOTO, YASUHIRO
Executed: 2008-11-05
NAGASAKU, SHIGEO
Executed: 2008-11-05
CLEM, DAVID W.
Executed: 2008-12-12
Assignees
SUMITOMO METAL INDUSTRIES, LTD.
5-33, KITAHAMA 4-CHOME, CHUO-KU, OSAKA-SHI, OSAKA, 541-0041, JAPAN
DRILLTEC PATENTS & TECHNOLOGIES COMPANY, INC.
10875 KEMPWOOD DRIVE, SUITE 2, HOUSTON, TEXAS, 77043
Covered Property
(1)
Protector for Tubular Threaded Joint
Related Assignments
(4)
Other recorded transfers of the patent in this record — the chain of ownership.
Security Agreement
Jul 13, 2012
From: DRILLTEC PATENTS & TECHNOLOGIES CORPORATION
To: COMERICA BANK, A TEXAS BANKING ASSOCIATION
Reel/Frame 028550/0321 →
Merger
Feb 27, 2013
From: SUMITOMO METAL INDUSTRIES, LTD.
To: NIPPON STEEL & SUMITOMO METAL CORPORATION
Reel/Frame 029885/0001 →
Release of Security Interest
Jun 14, 2014
From: COMERICA BANK
To: DRILLTEC PATENTS & TECHNOLOGIES CORPORATION
Reel/Frame 033166/0218 →
Change of Name
May 14, 2019
From: NIPPON STEEL & SUMITOMO METAL CORPORATION
To: NIPPON STEEL CORPORATION
Reel/Frame 049257/0828 →