Patent Assignment
Reel/Frame 020611/0390
Assignment of Assignor's Interest
Recorded: 2008-03-06
Pages: 3
Assignor
DUYVESTEYN, WILLEM P.C.
Executed: 2008-03-04
Assignee
MARATHON OIL COMPANY
5555 SAN FELIPE, HOUSTON, TEXAS, 77056
Covered Property
(1)
System and Method of Separating Bitumen from Tar Sands
Related Assignments
(6)
Other recorded transfers of the patent in this record — the chain of ownership.
Assignment of Assignor's Interest
Dec 23, 2008
From: MARATHON OIL COMPANY
To: MARATHON OIL CANADA CORPORATION
Reel/Frame 022022/0771 →
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 →
Assignment of Assignor's Interest
Jan 15, 2014
From: MARATHON OIL CANADA CORPORATION; ALBERTA CORPORATION
To: SHELL CANADA ENERGY; CHEVRON CANADA LIMITED
Reel/Frame 031971/0680 →
Assignment of Assignor's Interest
Jul 2, 2014
From: MARATHON OIL CANADA CORPORATION
To: SHELL CANADA ENERGY; CHEVRON CANADA LIMITED
Reel/Frame 033233/0532 →
Nunc Pro Tunc Assignment
Feb 27, 2018
From: SHELL CANADA ENERGY
To: CANADIAN NATURAL UPGRADING LIMITED
Reel/Frame 045054/0463 →