Patent Assignment
Reel/Frame 020921/0715
Assignment of Assignor's Interest
Recorded: 2008-05-08
Pages: 2
Assignor
PUTZIG, DONALD EDWARD
Executed: 2007-12-14
Assignee
E. I. DU PONT DE NEMOURS AND COMPANY
4417 LANCASTER PIKE, LEGAL-PATENTS, WILMINGTON, DELAWARE, 19805
Covered Property
(1)
Process to Prepare Borozirconate Solution and Use as a Cross-Linker in Hydraulic Fracturing Fluids
Related Assignments
(1)
Other recorded transfers of the patent in this record — the chain of ownership.