Patent Assignment
Reel/Frame 008579/0821
Assignment of Assignor's Interest
Recorded: 1997-06-25
Pages: 3
Assignor
CHEREWYK, BRUCE
Executed: 1997-04-09
Assignee
TREE SAVERS INTERNATIONAL LTD.
P.O. BOX 1454, GRANDE PRAIRIE, ALBERTA, T8V 4, CANADA
Covered Property
(1)
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
(8)
Other recorded transfers of the patent in this record — the chain of ownership.
Assignment of Assignor's Interest
Jun 25, 1997
From: ROESCH, ALBERT
To: TREE SAVERS INTERNATIONAL, LTD.
Reel/Frame 008579/0831 →
Assignment of Assignor's Interest
Jun 25, 1997
From: MCLEOD, RODERICK D.
To: TREE SAVERS INTERNATIONAL, LTD.
Reel/Frame 008579/0827 →
Assignment of Assignor's Interest
Jan 29, 2002
From: TREE SAVERS INTERNATIONAL LTD.
To: TREE SAVERS INTERNATIONAL INC.
Reel/Frame 012520/0409 →
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
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 →