Patent Assignment
Reel/Frame 031456/0395
Assignment of Assignor's Interest
Recorded: 2013-10-22
Pages: 12
Assignors
WITSCHI, CLAUDIA
Executed: 2013-08-30
PARK, JUNG MIN
Executed: 2013-08-26
THOMPSON, MICHAEL D.
Executed: 2013-08-28
MARTINELLI, MICHAEL JOHN
Executed: 2013-09-20
YEOWELL, DAVID A.
Executed: 2013-09-06
AREND, MICHAEL
Executed: 2013-08-27
Assignee
FIBROGEN, INC.
409 ILLINOIS STREET, SAN FRANCISCO, CALIFORNIA, 94158
Covered Property
(1)
Crystalline Forms of a Prolyl Hydroxylase Inhibitor
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 →