Mundra Solar PV Limited vs. First Solar, Inc.

Explore the PTAB proceeding IPR2025-01411 filed by Mundra Solar PV Limited on 2025-08-15. This includes filing dates, application numbers, tech centers, patent numbers, and current case status.

Proceeding Overview

Proceeding Number

IPR2025-01411

Filing Date

2025-08-15

Accorded Filing Date

2025-08-15

Institution Decision Date

2025-12-11

Last Modified Date

2026-01-13

Proceeding Type

IPR

Termination Date

2025-12-11

Trial Status

Discretionary Denial

Parties & Counsel

Petitioner

Mundra Solar PV Limited

Represented By

Tennant, Davidet al

Patent Owner / Respondent

First Solar, Inc.

Represented By

Goswami, Sharonmoyeeet al

Tribunal & Venue

Tribunal

Patent Trial and Appeal Board (USPTO)

Technology Center

TC 1700 - Chemical & Materials Engineering

Patent Information

1 Patent Involved

Respondent Application Number 14829999

Respondent Patent Number 9666732

External Links

Espacenet

Google Patents

Respondent Inventor Oliver SCHULTZ-WITTMANN et al

Respondent Tech Center TC 1700 - Chemical & Materials Engineering

Address and Attorney/Agent Information

24 Registered Practitioners

Power of Attorney & Correspondence

Firm / Entity Name HESLIN ROTHENBERG FARLEY & MESITI PC

Customer Number 23405

Address 5 COLUMBIA CIRCLE, ALBANY, NY, 12203, UNITED STATES

Attorney / Agent Information

Reg #	Name	Phone
31789	Kevin Radigan	518-452-5600
31833	Susan Farley	518-452-5600
32700	Philip Hansen	518-452-5600
32782	Nicholas Mesiti	518-452-5600
35670	Blanche Schiller	518-452-5600
36632	David Pascarella	518-452-5600
37283	George Blasiak	315-247-8167
42136	Stephen Scuderi	518-452-5600
44589	Victor Cardona	518-452-5600
46787	Brett Hutton	518-452-5600
51709	Alana Fuierer	518-452-5600
56658	John Boger	518-452-5600
57052	Melvin Li	408-837-1623
61998	Kellie Fredericks	518-452-5600
63442	Kristian Ziegler	518-452-5600
64367	Jacquelyn Graff	518-452-5600
65554	Teige Sheehan	518-452-5600
65765	Erica Hines	518-452-5600
68483	Matthew Hulihan	518-452-5600
71888	Rachel Pearlman	518-452-5600 X 272
78995	Christina Brule	518-452-5600
80383	Jake Goldsmith	518-213-8096
80516	Trent Rector	617-480-3312
81808	Emily Fraser	518-452-5600

Proceeding Documents

Director Discretionary Decision: Deny RESPONSE

2025-12-11 FILING PARTY: BOARD

Download

2018

Ex. 2018 - Declaration of Dr. Michael Dudley, Ph.D. in Support of Patent Owner Preliminary Response Exhibit

2025-11-19 FILING PARTY: PATENT OWNER

Download

1043

Siddiqui, Mohammed Ali. “Global Shifts: India's Potential to Benefit from the China Plus One Model.” Icon Solar-En Power Technologies Pvt. Ltd. Exhibit

2025-11-19 FILING PARTY: PETITIONER

Download

1037

ARENA Advisory Panel Members for Ultra Low-Cost Solar PV R&D Exhibit

2025-11-19 FILING PARTY: PETITIONER

Download

1041

First Solar 10k Annual Report Exhibit

2025-11-19 FILING PARTY: PETITIONER

Download

Mundra Solar PV Limited vs. First Solar, Inc.

Proceeding Overview

Parties & Counsel

Petitioner

Mundra Solar PV Limited

Represented By

Patent Owner / Respondent

First Solar, Inc.

Represented By

Tribunal & Venue

Patent Information

Address and Attorney/Agent Information

Power of Attorney & Correspondence

Attorney / Agent Information

Proceeding Documents

Director Discretionary Decision: Deny RESPONSE

Ex. 2018 - Declaration of Dr. Michael Dudley, Ph.D. in Support of Patent Owner Preliminary Response Exhibit

Siddiqui, Mohammed Ali. “Global Shifts: India's Potential to Benefit from the China Plus One Model.” Icon Solar-En Power Technologies Pvt. Ltd. Exhibit

ARENA Advisory Panel Members for Ultra Low-Cost Solar PV R&D Exhibit

First Solar 10k Annual Report Exhibit

District of Delaware Median Time to Trial Data Exhibit

Patent Owner Preliminary Response POPR

Solar Cells Market Size, Growth Outlook 2025-2034 Exhibit

Bebon, Joseph “First Solar Discontinues TetraSun Panel To Focus On CdTe” Solar Industry, 5 July 2016. Exhibit

Mundra Solar PV Ltd. Company Profile Exhibit

Osborne, Mark “First Solar Ends Heterojunction Foray; Shifts Malaysian Plant to CdTe Series 5 Assembly.” PV Tech, 5 July 2016. Exhibit

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

Bellini, Emiliano “First Solar Probes Potential Infringement of TOPCon Patents” PV Magazine, 19 July 2024. Exhibit

Ex. 2015 - Crystalline Silicon Photovoltaic Cells, ITC Pub. No. 5665 Exhibit

Ex. 2013 - USTR 2025 Special 301 Report Exhibit

Ex. 2017 - Letter to Counsel fm S. Etienne-Cummings re Stipulation Exhibit

Ex. 2009 - Yahoo! Finance - FirstSolar to Buy TetraSun, Gives View Exhibit

Ex. 2004 - PV Magazine India - Adani targets 10 GW of polysilicon-to-solar module capacity by 2025 Exhibit

Ex. 2008 - Adanisolar.com - Manufacturing Technologies Exhibit

Ex. 2003 - Taiyang News - PERC Solar Cell Technology 2016 Exhibit

Ex. 2016 - Mundra Scheduling Order Exhibit

Ex. 2010 - Business Wire - First Solar to Acquire TetraSun to Expand Addressable Market Opportunity Exhibit

Ex. 2012 - Progress in Photovoltaics - Silicon-based passivating contacts The TOPCon route Exhibit

Patent Owner's Request for Discretionary Denial RESPONSE

Ex. 2005 - PV Magazine - TOPCon_ The next big thing after PERC Exhibit

Ex. 2007 - Renewable Watch - Adani Solar launches 575 W TOPCon bifacial PV module Exhibit

Ex. 2011 - EE Power - First Solar to Acquire TetraSun to Expand Addressable Market Opportunity - News Exhibit

Ex. 2006 - Adanienterprises.com Press Release - Adani Enterprises FY23 Results Exhibit

Ex. 2014 - CSIS - 250325_Gupta_Intellectual_Property Exhibit

Declaration of Keith R. Hummel in Support of PHV Motion Exhibit

Motion for PHV Admission of Keith R. Hummel MOTION

Keith R. Hummel Biography Exhibit

Patent Owner's Mandatory Notices NOTICE

Patent Owner's Power of Attorney NOTICE

Notice: NOTICE OF FILING DATE ACCORDED TO PETITION AND TIME FOR FILING PATENT OWNER PRELIMINARY RESPONSE NOTICE

Declaration of Sylvia Hall-Ellis '732 (Corrected) Exhibit

Ni, Electrical conductivity of semi-insulating polycrystalline silicon 1981 Exhibit

Curriculum Vitae of Dr. Sanjay Banerjee, Ph.D. Exhibit

Petitioner for Inter Partes Review of U.S. Patent No. 9,666,732 PETITION

Power of Attorney for Mundra '732 NOTICE

May, Fundamentals of Semiconductor- 2004 Exhibit

Yablonovitch, Electron‐hole recombination at the Si‐SiO2 interface, 1986 Exhibit

Batra, Study of Lateral Non-Uniformity as a Function of Junction 1992 Exhibit

Sah, Diffusion of phosphorus in silicon oxide film 1959 Exhibit

Green, Solar cells Operating principles, tech., and sys. apps. 1982 (Pt. 1) Exhibit

Jorgensen, TEM investigation of the effect of anneal temperature 1985 Exhibit

Swanson, Approaching the 29% limit efficiency of silicon solar cells 2005 Exhibit

Wilson, Elec. and Microstructural Inv. into the Effect of Arsenic Emitter Exhibit

Patton, Impact of processing parameters on base current in polysilicon 1985 Exhibit

Shimakura, Boron and phosphorus diffusion through an SiO₂ Exhibit

Neamen, D. A. Semiconductor physics and devices: Basic principles (2012) Exhibit

Wesoff, SunPower’s Dick Swanson Still Very Much Alive. 2011 Exhibit

U.S. Patent No. 9,666,732 to Schultz-Wittmann Exhibit

Thomas, Electron trapping lvl in silicon dioxide thermally grown on silicon Exhibit

Kwark, SIPOS heterojunction contacts to silicon, Int'l Electron Mtg. 1984 Exhibit

Gan, Polysilicon emitters for silicon concentrator solar cells, 1990 Exhibit

Kragler, Character. of SIPOS films by spectroscopic ellipsometry and trns. Exhibit

Hamasaki, Crystallographic study of semi-insulating polycrystalline silicon Exhibit

Thurston, Diffusion of impurities into Silicon through an Oxide Layer Exhibit

Wolstenholme, An investigation of the thermal stability of the interfacial Exhibit

Cook, Photovoltaic fundamentals (SERI/TP-220-3957) 1991 Exhibit

Declaration of Sylvia Hall-Ellis '732 Exhibit

Ghoshtagore, Silicon dioxide masking of phosphorus diffus. in silicon. 1975 Exhibit

Crabbe, Elecl. characterization of polysilicon-to-silicon interfaces 1988 Exhibit

File History for U.S. Patent No. 9,666,732 Exhibit