Home › PTAB Cases › IPR2025-00371

POSCO Co., Ltd. et al. vs. ArcelorMittal

Explore the PTAB proceeding IPR2025-00371 filed by POSCO Co., Ltd. et al. on 2024-12-23. This includes filing dates, application numbers, tech centers, patent numbers, and current case status.

Proceeding Overview

Proceeding Number

IPR2025-00371

Filing Date

2024-12-23

Accorded Filing Date

2024-12-23

Institution Decision Date

2025-07-23

Last Modified Date

2026-08-18

Proceeding Type

IPR

Termination Date

2026-07-16

Trial Status

Final Written Decision

Parties & Counsel

Petitioner

POSCO Co., Ltd. et al.

Represented By

Monaldo, Jeremyet al

Patent Owner / Respondent

ArcelorMittal

Represented By

Buroker, Brianet 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 17319306

Respondent Patent Number 11326227

External Links

Espacenet

Google Patents

Respondent Inventor Pascal DRILLET et al

Respondent Tech Center TC 1700 - Chemical & Materials Engineering

Address and Attorney/Agent Information

6 Registered Practitioners

Power of Attorney & Correspondence

Firm / Entity Name Davidson Kappel LLC

Customer Number 23280

Address 589 8th Avenue, 22nd Floor, New York, NY, 10018, UNITED STATES

Attorney / Agent Information

Reg #	Name	Phone
36561	Cary Kappel	212-736-1257
38156	William Gehris	212-736-1940
38854	Leslye Davidson	212-736-1940
46385	David Petroff	--
56963	Oleg Ioselevich	212-736-6048
62380	Clint Mehall	212-736-1940

Proceeding Documents

159

Final Written Decision: DECISION Final Written Decision Determining All Challenged Claims Unpatentable 35 U.S.C. § 318(a) FINAL

2026-07-16 FILING PARTY: BOARD

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Other: Hearing transcript OTHER

2026-05-29 FILING PARTY: BOARD

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2044

Ex. 2044 Part 2 of 2 Exhibit

2026-05-08 FILING PARTY: PATENT OWNER

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2044

Ex. 2044 Part 1 of 2 Exhibit

2026-05-08 FILING PARTY: PATENT OWNER

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Joint Submission of ITC Final Initial Determination and Commission Determination OTHER

2026-05-08 FILING PARTY: PATENT OWNER

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2045

Ex. 2045 Exhibit

2026-05-08 FILING PARTY: PATENT OWNER

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Petitioner's Updated Exhibit List NOTICE

2026-04-20 FILING PARTY: PETITIONER

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2043

Patent Owner's Demonstratives Exhibit

2026-04-20 FILING PARTY: PATENT OWNER

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Petitioner's LEAP Request GRANTED (Alexander Berg) NOTICE

2026-04-20 FILING PARTY: BOARD

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1084

Petitioner's Demonstratives Exhibit

2026-04-20 FILING PARTY: PETITIONER

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Patent Owner's Surreply OTHER

2026-04-03 FILING PARTY: PATENT OWNER

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2041

Miles Deposition Transcript Exhibit

2026-04-03 FILING PARTY: PATENT OWNER

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2042

Raabe deposition errata Exhibit

2026-04-03 FILING PARTY: PATENT OWNER

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Order: Setting Oral Argument ORDER

2026-04-02 FILING PARTY: BOARD

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Joint Stipulation to Modify Scheduling Order OTHER

2026-03-19 FILING PARTY: PATENT OWNER

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Petitioners' and Patent Owner's Joint Request for Oral Argument OTHER

2026-03-11 FILING PARTY: PATENT OWNER

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Patent Owner's Objections to Petitioner's Reply Exhibits OTHER

2026-03-06 FILING PARTY: PATENT OWNER

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1078

Transcript of Deposition of Dierk Raabe, Ph.D Exhibit

2026-02-27 FILING PARTY: PETITIONER

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1081

Patent Owner's Sur-Reply To Petitioner's Response (IPR2019- 01275) Exhibit

2026-02-27 FILING PARTY: PETITIONER

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1077

Transcript of Deposition of Anthony Deardo, Ph.D. (IPR2019- 01275) Exhibit

2026-02-27 FILING PARTY: PETITIONER

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1083

Capture of https://automotive.arcelormittal.com/news_and_stories/cases/20 19Usibor20years (captured February 25, 2026) Exhibit

2026-02-27 FILING PARTY: PETITIONER

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1075

Rebuttal Declaration of Dr. Michael Miles Exhibit

2026-02-27 FILING PARTY: PETITIONER

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1082

Rebuttal Declaration of June Ann Munford Exhibit

2026-02-27 FILING PARTY: PETITIONER

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1076

Declaration of Dr. Raabe (IPR2024-01377) Exhibit

2026-02-27 FILING PARTY: PETITIONER

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1079

Excerpt from Webster's Third New International Dictionary (2002) Exhibit

2026-02-27 FILING PARTY: PETITIONER

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Petitioner's Reply to Patent Owner's Response REPLYTOOPP

2026-02-27 FILING PARTY: PETITIONER

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Joint Stipulation to Modify Due Dates 2 and 3 NOTICE

2026-02-17 FILING PARTY: PETITIONER

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Petitioner's Notice of Deposition of Patent Owner's Expert, Dr. Dierk Raabe NOTICE

2025-12-09 FILING PARTY: PETITIONER

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2020

Curriculum Vitae of Dr. Dierk Raabe Exhibit

2025-11-19 FILING PARTY: PATENT OWNER

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2028

Declaration of Dr. Michael Miles, Exhibit 1003, POSCO Co., Ltd. v. ArcelorMittal, IPR2024-01376 (PTAB) Exhibit

2025-11-19 FILING PARTY: PATENT OWNER

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2036

Influence of intermetallic phases and Kirkendall-porosity on the mechanical properties of joints between steel and aluminum alloys Exhibit

2025-11-19 FILING PARTY: PATENT OWNER

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2038

Sauthoff, Gerhard. Intermetallics (March 9, 1995) Exhibit

2025-11-19 FILING PARTY: PATENT OWNER

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2033

Atom probe tomography of intermetallic phases and interfaces formed in dissimilar joining between Al Alloys and Steel. Exhibit

2025-11-19 FILING PARTY: PATENT OWNER

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2026

Testing formability in the hot stamping of HSS Exhibit

2025-11-19 FILING PARTY: PATENT OWNER

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2023

Phase transformation testing and modeling for hot stamping of boron steel considering the effect of the prior austenite deformation Exhibit

2025-11-19 FILING PARTY: PATENT OWNER

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2037

Steurer, W., Dshemuchadse, Julia. Intermetallics: Structures, Properties, and Statistics. (August 4, 2016) Exhibit

2025-11-19 FILING PARTY: PATENT OWNER

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2029

Declaration of Dr. Michael Miles, Exhibit 1003, POSCO Co., Ltd. v. ArcelorMittal, IPR2019-01275 (PTAB) Exhibit

2025-11-19 FILING PARTY: PATENT OWNER

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2040

Declaration of Dierk Raabe Exhibit

2025-11-19 FILING PARTY: PATENT OWNER

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2034

Effect of silicon on the microstructure and growth kinetics of intermetallic phases formed during hot-dip aluminizing of Ferritic Steel Exhibit

2025-11-19 FILING PARTY: PATENT OWNER

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2032

On the formation and growth of intermetallic phases during interdiffusion between low-carbon steel and aluminum alloys Exhibit

2025-11-19 FILING PARTY: PATENT OWNER

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2021

Deposition Transcript of Dr. Michael Miles (Oct. 24, 2025) Exhibit

2025-11-19 FILING PARTY: PATENT OWNER

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2027

Phase composition of Al-Si coating from the initial state to the hot-stamped condition Exhibit

2025-11-19 FILING PARTY: PATENT OWNER

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2031

Petition, POSCO Co., Ltd. v. ArcelorMittal, IPR2019-01275 (PTAB) Exhibit

2025-11-19 FILING PARTY: PATENT OWNER

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2022

Joint Technology Stipulation Exhibit

2025-11-19 FILING PARTY: PATENT OWNER

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2025

Investigation of 22MNB5 formability in Hot Stamping Operations. Journal of Materials Processing Technology Exhibit

2025-11-19 FILING PARTY: PATENT OWNER

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2024

Microstructural features and mechanical properties of 22mnb5 hot stamping steel in different heat treatment conditions Exhibit

2025-11-19 FILING PARTY: PATENT OWNER

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PATENT OWNER'S RESPONSE RESPONSE

2025-11-19 FILING PARTY: PATENT OWNER

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2030

Petition, POSCO Co., Ltd. v. ArcelorMittal, IPR2024-01376 (PTAB) Exhibit

2025-11-19 FILING PARTY: PATENT OWNER

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2039

Pottgen, R., Johren, D. Intermetallics (2014). Exhibit

2025-11-19 FILING PARTY: PATENT OWNER

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2035

Deformation induced degradation of hot-dip aluminized steel. Materials Science and Engineering Exhibit

2025-11-19 FILING PARTY: PATENT OWNER

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Order: Granting Patent Owners Motions for Admission Pro Hac Vice of Allen Kathir and Raymond LaMagna 37 C.F.R. sec. 42.10 ORDER

2025-10-21 FILING PARTY: BOARD

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Panel Change Order ORDER

2025-10-15 FILING PARTY: BOARD

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Patent Owner's Motion for Admission of Raymond LaMagna MOTION

2025-10-08 FILING PARTY: PATENT OWNER

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2019

LaMagna Declaration Exhibit

2025-10-08 FILING PARTY: PATENT OWNER

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Patent Owner's Notice of Deposition of Dr. Michael Miles NOTICE

2025-10-06 FILING PARTY: PATENT OWNER

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Patent Owner's Motion for Admission Pro Hac Vice of Allen Kathir MOTION

2025-10-02 FILING PARTY: PATENT OWNER

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2018

Ex. 2018 Kathir Declaration Exhibit

2025-10-02 FILING PARTY: PATENT OWNER

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Joint Stipulation to Modify Scheduling Order OTHER

2025-10-02 FILING PARTY: PATENT OWNER

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3001

Related Matters Update Exhibit

2025-09-26 FILING PARTY: BOARD

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General Order: Related Matters Updates ORDER

2025-09-20 FILING PARTY: BOARD

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Order: ORDER TERMINATING IPR2024-01376 and IPR2024-01377 35 U.S.C. sec. 325d ORDER

2025-08-19 FILING PARTY: BOARD

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Patent Owner's Response to Petitioner's Brief Ranking Petitions Challenging U.S. Patent No. 11,326,227 OTHER

2025-08-14 FILING PARTY: PATENT OWNER

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Petitioner's Brief Ranking Petitions OTHER

2025-08-04 FILING PARTY: PETITIONER

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SCHEDULING ORDER ORDER

2025-07-24 FILING PARTY: BOARD

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Decision Granting Institution of Inter Partes Review DECISION

2025-07-23 FILING PARTY: BOARD

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Director Discretionary Decision: Refer RESPONSE

2025-06-25 FILING PARTY: BOARD

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1070

Full Prosecution History Patent 10,961,602_Appl No 16413799_Part 2 Exhibit

2025-05-28 FILING PARTY: PETITIONER

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1068

Institution Decision in IPR2024-01377, against the’227 Patent (EX-1001), March 18, 2025 Exhibit

2025-05-28 FILING PARTY: PETITIONER

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1062

Order Granting Joint Stipulation to Stay, Arcelormittal v. Vinfast Auto LLC et al., Case No. 2-24-cv-03128-46 (CDCA), June 30, 2024 Exhibit

2025-05-28 FILING PARTY: PETITIONER

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1070

Full Prosecution History Patent 10,961,602_Appl No 16413799_Part 1 Exhibit

2025-05-28 FILING PARTY: PETITIONER

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1066

US Patent No. 8,307,680 Exhibit

2025-05-28 FILING PARTY: PETITIONER

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1074

ITC Order 11 Amending Procedural Schedule, Inv. No. 337- TA-1402, September 27, 2024 Exhibit

2025-05-28 FILING PARTY: PETITIONER

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1061

Plaintiff Arcelormittal’s Complaint for Patent Infringement, Arcelormittal v. Vinfast Auto LLC et al., Case No. 2-24-cv- 03128-1 (CDCA), April 16, 2024 Exhibit

2025-05-28 FILING PARTY: PETITIONER

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Petitioner's Opposition to Patent Owner's Discretionary Denial Brief RESPONSE

2025-05-28 FILING PARTY: PETITIONER

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1069

US Patent No. 10,550,447 Exhibit

2025-05-28 FILING PARTY: PETITIONER

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1065

ITC Day 4 Transcript of Evidentiary Hearing, Volume 4, ITC Inv. No. 337-TA-1402, March 6, 2025 Exhibit

2025-05-28 FILING PARTY: PETITIONER

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1067

Patent Owner’s Preliminary Response in IPR2024-01377, against the ’227 Patent (EX-1001), December 24, 2024 Exhibit

2025-05-28 FILING PARTY: PETITIONER

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1064

ITC Day 3 Transcript of Evidentiary Hearing, Volume 3, ITC Inv. No. 337-TA-1402, March 5, 2025 Exhibit

2025-05-28 FILING PARTY: PETITIONER

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1072

Complainant’s Reply Post-Hearing Brief, ITC Inv. No. 337- TA-1402, April 22, 2025 Exhibit

2025-05-28 FILING PARTY: PETITIONER

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1073

ITC Motion to Amend Procedural Schedule, Inv. No. 337-TA- 1402, September 27, 2024 Exhibit

2025-05-28 FILING PARTY: PETITIONER

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1063

ITC demonstratives, Direction Examination of Dr. Stuart Brown, Vinfast, ITC Inv. No. 337-TA-1402 Exhibit

2025-05-28 FILING PARTY: PETITIONER

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1071

Patent Owner’s Response in IPR2019-01275 against the ’683 Patent (EX-1028), April 8, 2020 Exhibit

2025-05-28 FILING PARTY: PETITIONER

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2016

File History of ’602 Patent - Part 2 Exhibit

2025-04-28 FILING PARTY: PATENT OWNER

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2015

Patent Owner’s Reply Post-Hearing Brief from ITC Investigation Exhibit

2025-04-28 FILING PARTY: PATENT OWNER

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2011

Day One Trial Transcript from ITC Investigation Exhibit

2025-04-28 FILING PARTY: PATENT OWNER

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2012

Day Two Trial Transcript from ITC Investigation Exhibit

2025-04-28 FILING PARTY: PATENT OWNER

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PATENT OWNER’S DISCRETIONARY DENIAL BRIEF RESPONSE

2025-04-28 FILING PARTY: PATENT OWNER

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2016

File History of ’602 Patent - Part 4 Exhibit

2025-04-28 FILING PARTY: PATENT OWNER

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2002

RPI’s Takagi Invalidity Chart from ITC Investigation Exhibit

2025-04-28 FILING PARTY: PATENT OWNER

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2006

RPI’s Suehiro Invalidity Chart from ITC Investigation Exhibit

2025-04-28 FILING PARTY: PATENT OWNER

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2008

Excerpted RPI’s Expert Report Regarding Invalidity from ITC Investigation Exhibit

2025-04-28 FILING PARTY: PATENT OWNER

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2014

RPI’s Opening Post-Hearing Brief from ITC Investigation Exhibit

2025-04-28 FILING PARTY: PATENT OWNER

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2009

RPI’s Pre-Hearing Brief from ITC Investigation - Part 1 Exhibit

2025-04-28 FILING PARTY: PATENT OWNER

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2004

RPI’s Laurent Invalidity Chart from ITC Investigation Exhibit

2025-04-28 FILING PARTY: PATENT OWNER

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2001

Order No. 7: Procedural Schedule from ITC Investigation Exhibit

2025-04-28 FILING PARTY: PATENT OWNER

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2016

File History of ’602 Patent - Part 3 Exhibit

2025-04-28 FILING PARTY: PATENT OWNER

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2017

File History of ’683 Patent Exhibit

2025-04-28 FILING PARTY: PATENT OWNER

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2010

Patent Owner’s Pre-Hearing Brief from ITC Investigation - Part 2 Exhibit

2025-04-28 FILING PARTY: PATENT OWNER

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2009

RPI’s Pre-Hearing Brief from ITC Investigation - Part 2 Exhibit

2025-04-28 FILING PARTY: PATENT OWNER

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2010

Patent Owner’s Pre-Hearing Brief from ITC Investigation - Part 1 Exhibit

2025-04-28 FILING PARTY: PATENT OWNER

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2007

RPI’s Invalidity Contentions from ITC Investigation Exhibit

2025-04-28 FILING PARTY: PATENT OWNER

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2013

Day Three Trial Transcript from ITC Investigation Exhibit

2025-04-28 FILING PARTY: PATENT OWNER

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2016

File History of ’602 Patent - Part 1 Exhibit

2025-04-28 FILING PARTY: PATENT OWNER

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2003

RPI’s Cornette Invalidity Chart from ITC Investigation Exhibit

2025-04-28 FILING PARTY: PATENT OWNER

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Notice: Extending Deadline for Discretion Briefing NOTICE

2025-03-28 FILING PARTY: BOARD

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Notice: Notice filing date accorded NOTICE

2025-01-30 FILING PARTY: BOARD

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Notice: Power of Attorney NOTICE

2025-01-09 FILING PARTY: PATENT OWNER

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Notice: Mandatory Notice NOTICE

2025-01-09 FILING PARTY: PATENT OWNER

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