Patent Assignment
Reel/Frame 031734/0984
Change of Name
Recorded: 2013-12-06
Pages: 2
Assignor
NEXEN ENERGY INC.
Executed: 2013-06-18
Assignee
NEXEN ENERGY ULC
2900, 801 - 7TH AVENUE S.W., CALGARY, ALBERTA, T2P 3P7, CANADA
Covered Property
(1)
Extended Reach Steam Assisted Gravity Drainage with Oxygen ("Ersagdox")
Application:
14/099,472 →
Publication:
US 2014/0166279
Related Assignments
(3)
Other recorded transfers of the patent in this record — the chain of ownership.
Assignment of Assignor's Interest
Dec 6, 2013
From: KERR, RICHARD KELSO
To: NEXEN INC.
Reel/Frame 031734/0966 →
Certificate of Continuation
Dec 6, 2013
From: NEXEN INC.
To: NEXEN ENERGY INC.
Reel/Frame 031768/0631 →
Change of Name
Feb 19, 2019
From: NEXEN ENERGY ULC
To: CNOOC PETROLEUM NORTH AMERICA ULC
Reel/Frame 048366/0576 →