Patent Assignment
Reel/Frame 020292/0049
Assignment of Assignor's Interest
Recorded: 2007-12-20
Pages: 4
Assignors
KLAUS, STEPHEN J.
Executed: 2006-09-06
WANG, QINGJIAN
Executed: 2006-09-14
NEFF, THOMAS B.
Executed: 2007-12-11
Assignee
FIBROGEN, INC.
225 GATEWAY BOULEVARD, SOUTH SAN FRANCISCO, CALIFORNIA, 94080
Covered Property
(1)
Methods for Improving Kidney Function
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 →