Patent Assignment
Reel/Frame 031805/0868
Certificate of Coverage
Recorded: 2013-12-12
Pages: 2
Assignor
NEXEN INC.
Executed: 2013-06-18
Assignee
NEXEN ENERGY INC.
2900, 801 - 7TH AVENUE S.W., CALGARY, ALBERTA, T2P 3P7, CANADA
Covered Property
(1)
Steam Assisted Gravity Drainage with Added Oxygen ("Sagdox") in Deep Reservoirs
Application:
14/104,711 →
Publication:
US 2014/0096962
Related Assignments
(3)
Other recorded transfers of the patent in this record — the chain of ownership.
Assignment of Assignor's Interest
Dec 12, 2013
From: KERR, RICHARD KELSO
To: NEXEN INC.
Reel/Frame 031774/0497 →
Change of Name
Dec 12, 2013
From: NEXEN ENERGY INC.
To: NEXEN ENERGY ULC
Reel/Frame 031774/0782 →
Change of Name
Feb 19, 2019
From: NEXEN ENERGY ULC
To: CNOOC PETROLEUM NORTH AMERICA ULC
Reel/Frame 048366/0576 →