Patent Assignment
Reel/Frame 012520/0409
Assignment of Assignor's Interest
Recorded: 2002-01-29
Pages: 5
Assignor
TREE SAVERS INTERNATIONAL LTD.
Executed: 2002-01-10
Assignee
TREE SAVERS INTERNATIONAL INC.
#805, 500-4TH AVENUE S.W., CALGARY, ALBERTA, T2P 2, CANADA
Covered Properties
(3)
Annular and Concentric Flow Wellhead Isolation Tool
Patent:
5,012,865 →
Application:
07/413,187 →
Packoff Nipple
Patent:
5,261,487 →
Application:
07/909,680 →
Well Head Isolation Tool Sealing Nipple Testing Apparatus and Method of Pressure Testing Isolation Tool Sealing Nipple Seals When in Position on a Well
Patent:
5,396,956 →
Application:
08/165,495 →
Related Assignments
(7)
Other recorded transfers of the patents in this record — the chain of ownership.
Assignment of Assignor's Interest
Jun 14, 2004
From: TREE SAVERS INTERNATIONAL INC.
To: STINGER WELLHEAD PROTECTION INC.
Reel/Frame 015452/0633 →
Assignment of Assignor's Interest
Feb 25, 2005
From: TREE SAVERS INTERNATIONAL INC.
To: STINGER WELLHEAD PROTECTION INC.
Reel/Frame 016309/0502 →
Assignment of Assignor's Interest
Mar 25, 2005
From: TREE SAVERS INTERNATIONAL INC.
To: STINGER WELLHEAD PROTECTION INC.
Reel/Frame 016397/0267 →
Assignment of Assignor's Interest
Sep 6, 2005
From: STINGER WELLHEAD PROTECTION INC.
To: HWCES INTERNATIONAL, A CAYMAN ISLANDS CORPORATION
Reel/Frame 016958/0913 →
Assignment of Assignor's Interest
Dec 21, 2006
From: OIL STATES ENERGY SERVICES, INC.
To: STINGER WELLHEAD PROTECTION, INC.
Reel/Frame 018767/0230 →
Change of Assignee Address
Jul 19, 2007
From: STINGER WELLHEAD PROTECTION, INC.
To: STINGER WELLHEAD PROTECTION, INC.
Reel/Frame 019588/0172 →
Merger
Oct 15, 2012
From: STINGER WELLHEAD PROTECTION, INCORPORATED
To: OIL STATES ENERGY SERVICES, L.L.C.
Reel/Frame 029130/0379 →