Sun Pharmaceutical Industries, Inc. vs. Nivagen Pharmaceuticals, Inc.

Explore the PTAB proceeding IPR2025-00893 filed by Sun Pharmaceutical Industries, Inc. on 2025-04-22. This includes filing dates, application numbers, tech centers, patent numbers, and current case status.

Proceeding Overview

Proceeding Number

IPR2025-00893

Filing Date

2025-04-22

Accorded Filing Date

2025-04-22

Institution Decision Date

2025-09-19

Last Modified Date

2026-01-05

Proceeding Type

IPR

Termination Date

2025-09-19

Trial Status

Discretionary Denial

Parties & Counsel

Petitioner

Sun Pharmaceutical Industries, Inc.

Represented By

Vandenburgh, Johnet al

Patent Owner / Respondent

Nivagen Pharmaceuticals, Inc.

Represented By

Upadhye, Shashanket al

Tribunal & Venue

Tribunal

Patent Trial and Appeal Board (USPTO)

Technology Center

TC 1600 - Biotechnology & Organic Chemistry

Patent Information

1 Patent Involved

Respondent Application Number 18100804

Respondent Patent Number 11878076

External Links

Espacenet

Google Patents

Respondent Inventor Bala Tripura Sundari Chodavarapu et al

Respondent Tech Center TC 1600 - Biotechnology & Organic Chemistry

Address and Attorney/Agent Information

6 Registered Practitioners

Power of Attorney & Correspondence

Firm / Entity Name Umberg Zipser LLP

Customer Number —

Address 1920 Main Street Suite 750, Irvine, CA, 92614, UNITED STATES

Attorney / Agent Information

Reg #	Name	Phone
46697	Martin Fessenmaier	949-679-0052
56122	Mei Tsang	949-679-0052
61570	Ryan Dean	949-679-0052
70109	Priti Phukan	949-679-0052
81519	Darian Mcmillan	858-922-4780
83775	Nasser Khateeb	949-679-0052

Proceeding Documents

126

Notice: refund approved NOTICE

2026-01-05 FILING PARTY: BOARD

Download

Petitioner’s Request for Refund of Post-institution Fees OTHER

2025-12-23 FILING PARTY: PETITIONER

Download

Order Denying Director Review of Institution Decision REHEARING

2025-12-15 FILING PARTY: BOARD

Download

Authorized Response to Director Review Request OTHER

2025-10-27 FILING PARTY: PATENT OWNER

Download

3100

Email, Subject_IPR2025-00893 Director Review Request Exhibit

2025-10-21 FILING PARTY: BOARD

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Sun Pharmaceutical Industries, Inc. vs. Nivagen Pharmaceuticals, Inc.

Proceeding Overview

Parties & Counsel

Petitioner

Sun Pharmaceutical Industries, Inc.

Represented By

Patent Owner / Respondent

Nivagen Pharmaceuticals, Inc.

Represented By

Tribunal & Venue

Patent Information

Address and Attorney/Agent Information

Power of Attorney & Correspondence

Attorney / Agent Information

Proceeding Documents

Notice: refund approved NOTICE

Petitioner’s Request for Refund of Post-institution Fees OTHER

Order Denying Director Review of Institution Decision REHEARING

Authorized Response to Director Review Request OTHER

Email, Subject_IPR2025-00893 Director Review Request Exhibit

Request for Director Review - Institution Decision REQUEST

Director Discretionary Decision: Deny RESPONSE

Petitioner’s Updated Mandatory Notices NOTICE

Exhibit 1063 Pretrial Scheduling Order, ECF 209 Exhibit

Exhibit 1064 Scheduling and Trial Order for Jury Trial, ECF 34 Exhibit

Petitioner’s Response to Patent Owner’s Request for Discretionary Denial RESPONSE

Exhibit 1054 Text Order Exhibit

Exhibit 1053 Memorandum Order, ECF 71 Exhibit

Exhibit 1055 Orphan Drug Designation and Approvals – Sun, FDA Exhibit

Exhibit 1056 Orphan Drug Designation and Approvals – Nivagen, FDA Exhibit

Exhibit 1057 Defendant Sun’s Motion to Stay Deadlines and Motion for Protective Order Pending Transfer Exhibit

20250825 Patent Owner Nivagen Updated Power of Atty '076 IPR00893 (executed) NOTICE

Exhibit 1061 Letter from FDA to Sun Pharmaceutical Industries, Inc. Exhibit

20250825 Patent Owner Nivagen Updated Mandatory Notice'076 pat IPR 00893 NOTICE

Petitioner Motion for PHV Admission of S. Lockner MOTION

Exhibit 1058 Press Release - Sun Pharma Launches SEZABY™ in the U.S. for Treatment of Neonatal Seizures Exhibit

Ex 3001 Exhibit

Exhibit 1066 Declaration of Justin T. Oakland Exhibit

Exhibit 1060 Han et al. (2022) Exhibit

Exhibit 1059 Nivagen’s Supplemental Responses to Sun’s Second Set of Interrogatories Exhibit

Ex 3002 Exhibit

Exhibit 1062 Amended Rule 16 Scheduling Order, ECF 119 Exhibit

Exhibit 1065 Amended Scheduling Order, ECF 76 Exhibit

ORDER Granting Patent Owner’s Motion for Admission Pro Hac Vice of Yixin H. Tang Conditionally Granting Patent Owner’s Motion for Admission Pro Hac Vice of Christopher M. Bruno 37 C.F.R. § 42.10 ORDER

Certification of Peter M. Kohlhepp Exhibit

Petitioner's Notice of Intent to Designate a Provisionally Recognized PTAB Attorney as Back-up Counsel NOTICE

Declaration in Support of Motion for PHV Admission Exhibit

Petitioner's Motion for Pro Hac Vice Admission of S. Lockner OTHER

20250818 Ex2029-KlibanovDeclaration Exhibit

20250818 Ex2030-KlibanovCV Exhibit

20250818 Nivagen Patent Owner Preliminary Resp Brief POPR

20250818 Patent Owner Nivagen Motion for C. Bruno PHV '076 pat IPR 2025-00893 MOTION

Ex2007-20250709-6th-DEF-RFAs Exhibit

Ex2006-20250709-7th-DEF-ROGs Exhibit

Ex2024-Hikma Press Release Exhibit

Ex2002-DI37-Docket-Control-Order 24-cv-36 Exhibit

Ex2021-ExhibitB-1-608-Publ Exhibit

Ex2022-ExhibitB-2-Nobelbar Exhibit

Ex2025 NDC 0641-0476 Exhibit

Ex2028-Batzer-Decl Exhibit

Ex2023-ExhibitB-8-Hikma Exhibit

Ex2016-Klibanov-Decl-Support of Claim Construction Exhibit

Ex2018-CorbelCap-subpoena Exhibit

Ex2008-20241018-Motion-Rogatory Exhibit

Ex2014-LPR-41-disclosures Exhibit

Ex2017-DI58-redacted-opening-claim-constr-br Exhibit

Ex2005-20250429-4th-DEF-RFPs Exhibit

EX2013-Communications chains regarding samples Exhibit

Ex2012-Expert-Undertakings Exhibit

Ex2004-DI54-RULE 4-3 JOINT CLAIM CONSTRUCTION AND PREHEARING STATEMENT Exhibit

Ex2019-Sotera-emails Exhibit

Ex2026 NDC 0641-0477 Exhibit

Ex2009-Subpoena-BlankRome Exhibit

Ex2020-Communication chain re discovery Exhibit

Patent Owner Brief Support of Req Discr Denial IPR2025-00893 Pat No 11878076 RESPONSE

Ex2001-Docket Exhibit

Ex2015-LPR-42-proposed-contr Exhibit

Ex2027-20241022-Invalidity-Contentions Exhibit

Ex2010-Curia-subpoena Exhibit

Ex2011-Deposition-Notices Exhibit

ORDER Granting Patent Owner’s Motion for Admission Pro Hac Vice of Yixin H. Tang Conditionally Granting Patent Owner’s Motion for Admission Pro Hac Vice of Christopher M. Bruno 37 C.F.R. § 42.10 ORDER