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Patent Assignment
Reel/Frame 021621/0842

Assignment of Assignor's Interest

Recorded: 2008-10-02 Pages: 2
Assignor
CHEN, JOHN CHU
Executed: 2008-09-18
Assignee
E. I. DU PONT DE NEMOURS AND COMPANY
4417 LANCASTER PIKE, DUPONT LEGAL, WILMINGTON, DELAWARE, 19805
Covered Property (1)
Gas Permeable Membranes
Patent: 8,057,872 →
Application: 12/198,650 →
Publication: US 2010/0055276
Related Assignments (3)
Other recorded transfers of the patent in this record — the chain of ownership.
Assignment of Assignor's Interest Aug 22, 2019
From: E.I. DU PONT DE NEMOURS AND COMPANY
To: PERFORMANCE MATERIALS NA, INC.
Reel/Frame 050237/0001 →
Assignment of Assignor's Interest Oct 14, 2021
From: PERFORMANCE MATERIALS NA, INC.
To: THE DOW CHEMICAL COMPANY
Reel/Frame 057813/0792 →
Assignment of Assignor's Interest Oct 14, 2021
From: THE DOW CHEMICAL COMPANY
To: DOW GLOBAL TECHNOLOGIES LLC
Reel/Frame 057813/0928 →