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Patent Assignment
Reel/Frame 021573/0264

Assignment of Assignor's Interest

Recorded: 2008-09-23 Pages: 2
Assignor
U.S. STEEL MINING COMPANY, LLC
Executed: 2001-07-17
Assignee
CDX GAS, LLC
1001 MCKINNEY ST., SUITE 1600, HOUSTON, TEXAS, 75254
Covered Properties (2)
Method and System for Accessing Subterranean Deposits from the Surface
Patent: 8,511,372 →
Application: 11/981,939 →
Publication: US 2008/0121399
Method and System for Accessing Subterranean Deposits from the Surface
Patent: 8,297,350 →
Application: 11/982,232 →
Publication: US 2008/0060800
Related Assignments (3)
Other recorded transfers of the patents in this record — the chain of ownership.
Assignment of Assignor's Interest Sep 23, 2008
From: ZUPANICK, JOSEPH A.
To: CDX GAS, LLC
Reel/Frame 021572/0840 →
Change of Name Nov 2, 2009
From: CDX GAS, LLC
To: VITRUVIAN EXPLORATION, LLC
Reel/Frame 023456/0198 →
Assignment of Assignor's Interest Feb 12, 2014
From: VITRUVIAN EXPLORATION, LLC
To: EFFECTIVE EXPLORATION LLC
Reel/Frame 032263/0664 →