IP Library › Assignment 023128/0933
Patent Assignment
Reel/Frame 023128/0933

Assignment of Assignor's Interest

Recorded: 2009-08-21 Pages: 5
Assignors
DUYVESTEYN, WILLEM P.C.
Executed: 2009-08-06
KIFT, JULIAN
Executed: 2009-08-21
Assignee
MARATHON OIL CANADA CORPORATION
440 - SECOND AVENUE, S.W., ERNST & YOUNG TOWER, CALGARY, T2P 5E9, CANADA
Covered Property (1)
Dry,Stackable Tailings and Methods for Producing the Same
Patent: 8,257,580 →
Application: 12/512,758 →
Publication: US 2009/0301937
Related Assignments (6)
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 031971/0766 →
Assignment of Assignor's Interest Jan 15, 2014
From: MARATHON OIL CANADA CORPORATION; ALBERTA CORPORATION
To: SHELL CANADA ENERGY; CHEVRON CANADA LIMITED
Reel/Frame 031971/0844 →
Assignment of Assignor's Interest Jul 2, 2014
From: MARATHON OIL CANADA CORPORATION
To: SHELL CANADA ENERGY; CHEVRON CANADA LIMITED
Reel/Frame 033233/0928 →
Nunc Pro Tunc Assignment Feb 27, 2018
From: SHELL CANADA ENERGY
To: CANADIAN NATURAL UPGRADING LIMITED
Reel/Frame 045054/0463 →