Patent Assignment
Reel/Frame 031972/0250
Assignment of Assignor's Interest
Recorded: 2014-01-15
Pages: 4
Assignor
MARATHON OIL CANADA CORPORATION
Executed: 2013-12-05
Assignees
SHELL CANADA ENERGY
400 4TH AVENUE, S.W., CALGARY, ALBERTA, T2P 2H5, CANADA
CHEVRON CANADA LIMITED
500 5TH AVENUE, S.W., CALGARY, ALBERTA, T2P 0L7, CANADA
Covered Property
(1)
Methods for Extracting Bitumen from Bituminous Material
Application:
12/692,127 →
Publication:
US 2011/0180458
Related Assignments
(3)
Other recorded transfers of the patent in this record — the chain of ownership.
Assignment of Assignor's Interest
Mar 26, 2010
From: DUYVESTEYN, WILLEM P.C.; KIFT, JULIAN; THOMPSON, WHIP C.
To: MARATHON OIL CANADA CORPORATION
Reel/Frame 024147/0807 →
Change of Name
Jan 23, 2013
From: MARATHON OIL CANADA CORPORATION
To: MARATHON CANADIAN OIL SANDS HOLDING LIMITED
Reel/Frame 029676/0704 →
Change of Name
May 22, 2013
From: MARATHON CANADIAN OIL SANDS HOLDING LIMITED
To: MARATHON OIL CANADA CORPORATION
Reel/Frame 030467/0595 →