Patent Assignment
Reel/Frame 074923/0352
Change of Name
Recorded: 2026-02-18
Pages: 3
Assignor
FIBROGEN, INC.
Executed: 2025-12-29
Assignee
KYNTRA BIO, INC.
350 BAY STREET, SUITE 100 #6009, SAN FRANCISCO, CALIFORNIA, 94133
Covered Properties
(24)
Methods for Improving Kidney Function
Novel Nitrogen-Containing Heteroaryl Compounds and Methods of Use Thereof
Novel Nitrogen-Containing Heteroaryl Compounds and Methods of Use Thereof
Novel Nitrogen-Containing Heteroaryl Compounds and Methods of Use Thereof
Process for Making Isoquinoline Compounds
Process for Making Isoquinoline Compounds
Crystalline Forms of a Prolyl Hydroxylase Inhibitor
Crystalline Forms of a Prolyl Hydroxylase Inhibitor
Crystalline Forms of a Prolyl Hydroxylase Inhibitor
Crystalline Forms of a Prolyl Hydroxylase Inhibitor
Crystalline Forms of a Prolyl Hydroxylase Inhibitor
Crystalline Forms of a Prolyl Hydroxylase Inhibitor
Crystalline Forms of a Prolyl Hydroxylase Inhibitor
Pharmaceutical Formulations of a Hif Hydroxylase Inhibitor
Fat Regulation
Methods of Treatment of Cardiovascular Disease Using Anti-Ctgf Agents
Novel Thienopyridine Compounds, and Methods of Use Thereof
Cyanoisoquinoline Compounds and Methods of Use Thereof
Pyrrolo- and Thiazolo-Pyridine Compounds, and Methods of Use Thereof
Compounds and Methods for Treatment of Chemotherapy-Induced Anemia
Naphthyridine Derivatives as Inhibitors of Hypoxia Inducible Factor (Hif) Hydroxylase
Naphthyridine Derivatives as Inhibitors of Hypoxia Inducible Factor (Hif) Hydroxylase
Naphthyridine Derivatives as Inhibitors of Hypoxia Inducible Factor (Hif) Hydroxylase
4 -Hydroxy- Isoquinoline Compounds as Hif Hydroxylase Inhibitors
Related Assignments
(17)
Other recorded transfers of the patents in this record — the chain of ownership.
Assignment of Assignor's Interest
Jul 22, 2004
From: FOURNEY, PATRICK D.; GUENZLER-PUKALL, VOLKMAR; KLAUS, STEPHEN J.; LIN, AL Y.
To: FIBROGEN, INC.
Reel/Frame 014889/0080 →
Assignment of Assignor's Interest
Oct 3, 2006
From: PAROBOK, INGRID LANGSETMO; JACOB, CHRISTOPHER T.; LIU, DAVID Y.
To: FIBROGEN, INC.
Reel/Frame 018351/0973 →
Assignment of Assignor's Interest
Dec 20, 2007
From: KLAUS, STEPHEN J.; WANG, QINGJIAN; NEFF, THOMAS B.
To: FIBROGEN, INC.
Reel/Frame 020292/0049 →
Assignment of Assignor's Interest
Feb 16, 2011
From: AREND, MICHAEL P.; FLIPPIN, LEE A.; GUENZLER-PUKALL, VOLKMAR; HO, WEN-BEN
To: FIBROGEN, INC.
Reel/Frame 025820/0252 →
Corrective Assignment to Correct the Correct the Spelling of an Assignor's Name Previously Recorded on Reel 025820 Frame 0252. Assignor(S) Hereby Confirms the Correct the Spelling of an Assignor's Name.
Jun 28, 2011
From: AREND, MICHAEL P.; FLIPPIN, LEE A.; GUENZLER-PUKALL, VOLKMAR; HO, WEN-BIN
To: FIBROGEN, INC.
Reel/Frame 026513/0446 →
Assignment of Assignor's Interest
Oct 22, 2013
From: WITSCHI, CLAUDIA; PARK, JUNG MIN; THOMPSON, MICHAEL D.; MARTINELLI, MICHAEL JOHN
To: FIBROGEN, INC.
Reel/Frame 031454/0828 →
Assignment of Assignor's Interest
Oct 22, 2013
From: WITSCHI, CLAUDIA; PARK, JUNG MIN; THOMPSON, MICHAEL D.; MARTINELLI, MICHAEL JOHN
To: FIBROGEN, INC.
Reel/Frame 031456/0395 →
Assignment of Assignor's Interest
Jul 31, 2014
From: TURTLE, ERIC D.; FLIPPIN, LEE A.; AREND, MICHAEL P.; CHENG, HENG
To: FIBROGEN, INC.
Reel/Frame 033433/0033 →
Assignment of Assignor's Interest
Oct 21, 2014
From: AREND, MICHAEL P.; WITSCHI, CLAUDIA; PARK, JUNG MIN; THOMPSON, MICHAEL D.
To: FIBROGEN, INC.
Reel/Frame 033997/0509 →
Assignment of Assignor's Interest
Oct 7, 2015
From: WITSCHI, CLAUDIA; PARK, JUNG MIN; THOMPSON, MICHAEL D.; MARTINELLI, MICHAEL JOHN
To: FIBROGEN, INC.
Reel/Frame 036752/0804 →
Assignment of Assignor's Interest
May 9, 2016
From: THOMPSON, MICHAEL D.; PARK, JUNG MIN; AREND, MICHAEL P.
To: FIBROGEN, INC.
Reel/Frame 038515/0431 →
Assignment of Assignor's Interest
Jun 15, 2016
From: WITSCHI, CLAUDIA; PARK, JUNG MIN; THOMPSON, MICHAEL D.; MARTINELLI, MICHAEL JOHN
To: FIBROGEN, INC.
Reel/Frame 038924/0632 →
Assignment of Assignor's Interest
Jul 6, 2017
From: WITSCHI, CLAUDIA; PARK, JUNG MIN; THOMPSON, MICHAEL D.; MARTINELLI, MICHAEL JOHN
To: FIBROGEN, INC.
Reel/Frame 042927/0185 →
Assignment of Assignor's Interest
Nov 12, 2018
From: WITSCHI, CLAUDIA; PARK, JUNG MIN; THOMPSON, MICHAEL D.; MARTINELLI, MICHAEL JOHN
To: FIBROGEN, INC.
Reel/Frame 047474/0593 →
Assignment of Assignor's Interest
May 17, 2019
From: CONCA, DAVID; FLIPPIN, LEE ALLEN; LEIGH, SCOTT DAVID; WITSCHI, CLAUDIA
To: FIBROGEN, INC.
Reel/Frame 049211/0196 →
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 →