Patent Assignment
Reel/Frame 031558/0059
Assignment of Assignor's Interest
Recorded: 2013-11-06
Pages: 7
Assignors
NG, DANNY
Executed: 2013-11-06
AREND, MICHAEL P.
Executed: 2013-11-06
FLIPPIN, LEE A.
Executed: 2013-11-06
Assignee
FIBROGEN, INC.
409 ILLINOIS STREET, SAN FRANCISCO, CALIFORNIA, 94158
Covered Property
(1)
Naphthyridine Derivatives as Inhibitors of Hypoxia Inducible Factor (Hif) Hydroxylase
Related Assignments
(3)
Other recorded transfers of the patent in this record — the chain of ownership.
Security Interest
May 1, 2023
From: FIBROGEN, INC.
To: WILMINGTON TRUST, NATIONAL ASSOCIATION
Reel/Frame 063504/0221 →
Release of Security Interest
Sep 3, 2025
From: WILMINGTON TRUST, NATIONAL ASSOCIATION, AS AGENT
To: FIBROGEN, INC.
Reel/Frame 072785/0760 →
Change of Name
Feb 18, 2026
From: FIBROGEN, INC.
To: KYNTRA BIO, INC.
Reel/Frame 074923/0352 →