Patent Assignment
Reel/Frame 031666/0029
Certificate of Continuation
Recorded: 2013-11-18
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)
Method and System of Optimized Steam-Assisted Gravity Drainage with Oxygen ("Sagdoxo") for Oil Recovery
Application:
14/083,106 →
Publication:
US 2014/0076555
Related Assignments
(3)
Other recorded transfers of the patent in this record — the chain of ownership.
Assignment of Assignor's Interest
Nov 18, 2013
From: KERR, RICHARD KELSO
To: NEXEN INC.
Reel/Frame 031623/0843 →
Change of Name
Nov 18, 2013
From: NEXEN ENERGY INC.
To: NEXEN ENERGY ULC
Reel/Frame 031623/0938 →
Change of Name
Feb 19, 2019
From: NEXEN ENERGY ULC
To: CNOOC PETROLEUM NORTH AMERICA ULC
Reel/Frame 048366/0576 →