IP Library › Assignment 023407/0668
Patent Assignment
Reel/Frame 023407/0668

Assignment of Assignor's Interest

Recorded: 2009-10-22 Pages: 3
Assignors
DUYVESTEYN, WILLEM P.C.
Executed: 2009-10-08
KIFT, JULIAN
Executed: 2009-10-21
Assignee
MARATHON OIL CANADA CORPORATION
440 - SECOND AVENUE S.W., ERNST & YOUNG TOWER, CALGARY, T2P 5E9, CANADA
Covered Property (1)
Methods for Obtaining Bitumen from Bituminous Materials
Patent: 8,101,067 →
Application: 12/575,241 →
Publication: US 2010/0032348
Related Assignments (4)
Other recorded transfers of the patent in this record — the chain of ownership.
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 031971/0946 →
Nunc Pro Tunc Assignment Feb 27, 2018
From: SHELL CANADA ENERGY
To: CANADIAN NATURAL UPGRADING LIMITED
Reel/Frame 045054/0463 →