IP Library Assignment 021237/0243
Patent Assignment
Reel/Frame 021237/0243

Assignment of Assignor's Interest

Recorded: 2008-07-15 Pages: 4
Assignor
DUENCKEL, ROBERT JOHN
Executed: 2008-07-01
Assignee
CARBO CERAMICS INC.
6565 MACARTHUR BLVD., SUITE 1050, IRVING, TEXAS, 75039
Covered Properties (2)
Proppants for Gel Clean-Up
Patent: 7,721,804 →
Application: 12/166,504 →
Publication: US 2009/0008093
Proppants for Gel Clean-Up
Application: 60/948,384 →
Related Assignments (2)
Other recorded transfers of the patents in this record — the chain of ownership.
Patent Security Agreement Apr 28, 2016
From: CARBO CERAMICS INC.; FALCON TECHNOLOGIES AND SERVICES, INC.; STRATAGEN, INC.
To: WELLS FARGO BANK, NATIONAL ASSOCIATION
Reel/Frame 038555/0688 →
Release of Security Interest Mar 3, 2017
From: WELLS FARGO BANK, NATIONAL ASSOCIATION
To: CARBO CERAMICS INC.; ASSET GUARD PRODUCTS INC. (F/K/A FALCON TECHNOLOGIES AND SERVICES, INC.); STRATAGEN, INC.
Reel/Frame 041879/0930 →