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Merck Sharp & Dohme LLC v. Halozyme, Inc. et al. - PGR2025-00087

Explore the PTAB proceeding PGR2025-00087 filed by Merck Sharp & Dohme LLC against Halozyme, Inc. et al. on Nov 10, 2025. This includes filing dates, application numbers, tech centers, patent numbers, and current case status.

Case Details

Proceeding Number
PGR2025-00087
Filing Date
Nov 10, 2025
Petitioner
Merck Sharp & Dohme LLC
Respondent
Halozyme, Inc. et al.
Status
Pending
Respondent Application Number
18340786
Respondent Tech Center
1600
Respondent Patent Number
12371685

Decision Documents New

Decision pending - set alert to receive updates

Proceeding Documents

The table below shows documents filed in the case, listing each document name, filing date, document type, and filing party. Tracking these filings indicates the activity of the parties involved in the case, and the types of documents filed can provide insights into the legal strategies being employed.

Document NameFiling DateCategoryFiling Party

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EX2012 - District Court Complaint

Jan 6, 2026EXHIBITPATENT OWNER

EX2400 - Merck Co - 10Q - 11-05-2025

Jan 6, 2026EXHIBITPATENT OWNER

EX2402 - MERCK_PGR00006 - Sidley MSA (CONFIDENTIAL - PROTECTIVE ORDER MATERIAL)

Jan 6, 2026EXHIBITPATENT OWNER

EX2403 - MERCK_PGR00056 - Dechert MSA (CONFIDENTIAL - PROTECTIVE ORDER MATERIAL)

Jan 6, 2026EXHIBITPATENT OWNER

EX2404 - MERCK_PGR00467 - Mark Stewart Offer Letter (CONFIDENTIAL - PROTECTIVE ORDER MA

Jan 6, 2026EXHIBITPATENT OWNER

EX2405 - MERCK_PGR00052 - Hecht Engagement Letter (CONFIDENTIAL - PROTECTIVE ORDER MATE

Jan 6, 2026EXHIBITPATENT OWNER

EX2406 - MERCK_PGR00086 - Park Engagement Letter (CONFIDENTIAL - PROTECTIVE ORDER MATER

Jan 6, 2026EXHIBITPATENT OWNER

EX2407 - Executive Team - MSD

Jan 6, 2026EXHIBITPATENT OWNER

EX2408 - Executive Team - Merck

Jan 6, 2026EXHIBITPATENT OWNER

EX2409 - Board of Directors - MSD

Jan 6, 2026EXHIBITPATENT OWNER

EX2410 - Board of Directors - Merck

Jan 6, 2026EXHIBITPATENT OWNER

EX2411 - Contact Us - MSD

Jan 6, 2026EXHIBITPATENT OWNER

EX2412 - Contact Us - Merck

Jan 6, 2026EXHIBITPATENT OWNER

EX2413 - Who We Are - MSD

Jan 6, 2026EXHIBITPATENT OWNER

EX2414 - Who We Are - Merck

Jan 6, 2026EXHIBITPATENT OWNER

EX2415 - Merck Co - 10k - year 2024

Jan 6, 2026EXHIBITPATENT OWNER

EX2416 - USPTO OED Practitioner Search - Mark Stewart registration

Jan 6, 2026EXHIBITPATENT OWNER

EX2417 - IPR2024-00240 Petition

Jan 6, 2026EXHIBITPATENT OWNER

EX2418 - IPR2024-00622 Petition

Jan 6, 2026EXHIBITPATENT OWNER

EX2419 - IPR2024-00623 Petition

Jan 6, 2026EXHIBITPATENT OWNER

EX2420 - IPR2024-00624 Petition

Jan 6, 2026EXHIBITPATENT OWNER

EX2421 - IPR2024-00625 Petition

Jan 6, 2026EXHIBITPATENT OWNER

EX2422 - IPR2024-00647 Petition

Jan 6, 2026EXHIBITPATENT OWNER

EX2423 - IPR2024-00648 Petition

Jan 6, 2026EXHIBITPATENT OWNER

EX2425 - IPR2024-00650 Petition

Jan 6, 2026EXHIBITPATENT OWNER

EX2426 - MERCK_PGR00035 - 20250813 Payment Remittance (CONFIDENTIAL - PROTECTIVE ORDER MATERIAL)

Jan 6, 2026EXHIBITPATENT OWNER

EX2427 - MERCK_PGR00042 - Dechert T360 Halozyme (CONFIDENTIAL - PROTECTIVE ORDER MATERIAL)

Jan 6, 2026EXHIBITPATENT OWNER

EX2428 - MERCK_PGR00045 - FW_ Attn_ Accounts Receivable Dept (CONFIDENTIAL - PROTECTIVE ORDER MATERIAL)

Jan 6, 2026EXHIBITPATENT OWNER

EX2429 - MERCK_PGR00049 - Halozyme - 202000447 - Invoices (CONFIDENTIAL - PROTECTIVE ORDER MATERIAL)

Jan 6, 2026EXHIBITPATENT OWNER

EX2430 - MERCK_PGR00465 - Mark Stewart Payroll Statement (CONFIDENTIAL - PROTECTIVE ORDER MATERIAL)

Jan 6, 2026EXHIBITPATENT OWNER

EX2431 - MERCK_PGR00001 - Ginkel Organization Screen Shot (CONFIDENTIAL - PROTECTIVE ORDER MATERIAL)

Jan 6, 2026EXHIBITPATENT OWNER

EX2432 - MERCK_PGR00002 - Lally Organization Screen Shot (CONFIDENTIAL - PROTECTIVE ORDER MATERIAL)

Jan 6, 2026EXHIBITPATENT OWNER

EX2433 - MERCK_PGR00003 - Majchrzak Organization Screen Shot (CONFIDENTIAL - PROTECTIVE ORDER MATERIAL)

Jan 6, 2026EXHIBITPATENT OWNER

EX2434 - MERCK_PGR00004 - Stewart Organization Screen Shot (CONFIDENTIAL - PROTECTIVE ORDER MATERIAL)

Jan 6, 2026EXHIBITPATENT OWNER

EX2435 - MERCK_PGR00005 - Su Organization Screen Shot (CONFIDENTIAL - PROTECTIVE ORDER MATERIAL)

Jan 6, 2026EXHIBITPATENT OWNER

EX2436 - MERCK_PGR00036 - 20250903 Payment Remittance_Redacted (CONFIDENTIAL - PROTECTIVE ORDER MATERIAL)

Jan 6, 2026EXHIBITPATENT OWNER

EX2437 - MERCK_PGR00037 - 20251001 Payment Remittance_Redacted (CONFIDENTIAL - PROTECTIVE ORDER MATERIAL)

Jan 6, 2026EXHIBITPATENT OWNER

EX2438 - MERCK_PGR00038 - 20251203 Payment Remittance_Redacted (CONFIDENTIAL - PROTECTIVE ORDER MATERIAL)

Jan 6, 2026EXHIBITPATENT OWNER

EX2439 - MERCK_PGR00040 - 20251215 Payment Remittance_Redacted (CONFIDENTIAL - PROTECTIVE ORDER MATERIAL)

Jan 6, 2026EXHIBITPATENT OWNER

EX2440 - MERCK_PGR00046 - PAYMENT REMITTANCE DETAIL (Oct 2025) (CONFIDENTIAL - PROTECTIVE ORDER MATERIAL)

Jan 6, 2026EXHIBITPATENT OWNER

EX2441 - MERCK_PGR00047 - PAYMENT REMITTANCE DETAIL (Sep 2025) (CONFIDENTIAL - PROTECTIVE ORDER MATERIAL)

Jan 6, 2026EXHIBITPATENT OWNER

EX2442 - MERCK_PGR00048 - Invoice IN00125072310 Review History (CONFIDENTIAL - PROTECTIVE ORDER MATERIAL)

Jan 6, 2026EXHIBITPATENT OWNER

EX2443 - MERCK_PGR00050 - Invoices 5_1_2024-12_22_2025_2 of 3 (CONFIDENTIAL - PROTECTIVE ORDER MATERIAL)

Jan 6, 2026EXHIBITPATENT OWNER

EX2444 - MERCK_PGR00051 - Invoices 5_1_2024-12_22_2025_3 of 3 (CONFIDENTIAL - PROTECTIVE ORDER MATERIAL)

Jan 6, 2026EXHIBITPATENT OWNER

EX2445 - Merck Co - Bylaws

Jan 6, 2026EXHIBITPATENT OWNER

EX2424 - IPR2024-00649 Petition

Jan 6, 2026EXHIBITPATENT OWNER

EX2401 - E-mail (CONFIDENTIAL - PROTECTIVE ORDER MATERIAL)

Jan 6, 2026EXHIBITPATENT OWNER

Patent Owner's Motion to Seal

Jan 6, 2026PAPERPATENT OWNER

Patent Owner's Motion for Additional Discovery (CONFIDENTIAL - PROTECTIVE ORDER MATERIAL)

Jan 6, 2026PAPERPATENT OWNER

Patent Owner's Motion for Additional Discovery (PUBLIC - REDACTED)

Jan 6, 2026PAPERPATENT OWNER

Notice: Notice filing date accorded

Nov 20, 2025PAPERBOARD

Patent Owner's Power of Attorney

Nov 19, 2025PAPERPATENT OWNER

Patent Owner's Mandatory Notices

Nov 19, 2025PAPERPATENT OWNER

Primakoff et al., “Fully effective contraception in male and....(1988)

Nov 10, 2025EXHIBITPETITIONER

Errata and Acknowledgement to Dr. Michael Hecht's 8/26/2025 Deposition

Nov 10, 2025EXHIBITPETITIONER

Errata and Acknowledgement to Dr. Sheldon Park's 8/21/2025 Deposition

Nov 10, 2025EXHIBITPETITIONER

Errata and Acknowledgement to Dr. Sheldon Park's 8/7/2025 Deposition

Nov 10, 2025EXHIBITPETITIONER

Transcript of 8/21/2025 Deposition of Dr. Sheldon Park

Nov 10, 2025EXHIBITPETITIONER

Transcript of 8/7/2025 Deposition of Dr. Sheldon Park

Nov 10, 2025EXHIBITPETITIONER

Transcript of 8/26/2025 Deposition of Dr. Michael Hecht

Nov 10, 2025EXHIBITPETITIONER

U.S. Publication 2010/0143457

Nov 10, 2025EXHIBITPETITIONER

Vembar & Brodsky, “One Step at a Time: Endoplasmic Reticulum-....(2008)

Nov 10, 2025EXHIBITPETITIONER

Goldberg, Protein Degradation and Protection (2003)

Nov 10, 2025EXHIBITPETITIONER

Bookbinder, A Recombinant Human Enzyme for Enhanced Interstitial Transport

Nov 10, 2025EXHIBITPETITIONER

Hunnicutt, Sperm Surface Protein PH-20 Is Bifunctional (1996)

Nov 10, 2025EXHIBITPETITIONER

Swiss Model Printout of PH20 Model with E324R Mutation

Nov 10, 2025EXHIBITPETITIONER

Swiss Model Printout of PH20 Model with E324N Mutation

Nov 10, 2025EXHIBITPETITIONER

Swiss Model Printout of PH20 Model with E324D Mutation

Nov 10, 2025EXHIBITPETITIONER

Swiss Model Printout of PH20 Model

Nov 10, 2025EXHIBITPETITIONER

Collection of PyMol Webpages from the Internet Archive

Nov 10, 2025EXHIBITPETITIONER

Collection of SWISS-MODEL Webpages from the Internet Archive

Nov 10, 2025EXHIBITPETITIONER

Collection of Clustal Omega Webpages from the Internet Archive

Nov 10, 2025EXHIBITPETITIONER

Collection of BLAST Webpages from the Internet Archive

Nov 10, 2025EXHIBITPETITIONER

Rosengren, Clinical Immunogenicity of rHuPH20 (2015)

Nov 10, 2025EXHIBITPETITIONER

US Patent No. 12,371,685

Nov 10, 2025EXHIBITPETITIONER

Hecht, De Novo Proteins from Designed Combinatorial Libraries (2004)

Nov 10, 2025EXHIBITPETITIONER

Leisola & Turunen, Protein Engineering: Opportunities and Challenges (2007)

Nov 10, 2025EXHIBITPETITIONER

Ph20_pre2011 Alignment html

Nov 10, 2025EXHIBITPETITIONER

Ph20_pre2011.aln-clustal_num

Nov 10, 2025EXHIBITPETITIONER

Hom_pre2011.fasta

Nov 10, 2025EXHIBITPETITIONER

Hom_pre2011_header_clean

Nov 10, 2025EXHIBITPETITIONER

Hom_pre2011_header

Nov 10, 2025EXHIBITPETITIONER

File History of US Patent No. 12,371,685 Part 1

Nov 10, 2025EXHIBITPETITIONER

Hom_pre2011

Nov 10, 2025EXHIBITPETITIONER

File History of US Patent No. 12,371,685 Part 2

Nov 10, 2025EXHIBITPETITIONER

U.S. Patent Application No. 61/796,208

Nov 10, 2025EXHIBITPETITIONER

File History of US Patent No. 12,371,685 Part 3

Nov 10, 2025EXHIBITPETITIONER

U.S. Patent Application No. 61/631,313

Nov 10, 2025EXHIBITPETITIONER

Pace & Scholtz, A Helix Propensity Scale (1998)

Nov 10, 2025EXHIBITPETITIONER

KEGG, DRUG: Hyaluronidase (human recombinant)

Nov 10, 2025EXHIBITPETITIONER

Hayden, Key Protein-Design Papers Challenged (2009)

Nov 10, 2025EXHIBITPETITIONER

Xiong, Periodicity of Polar and Nonpolar Amino Acids (1995)

Nov 10, 2025EXHIBITPETITIONER

Declaration of Dr. Sheldon Park

Nov 10, 2025EXHIBITPETITIONER

Beasley & Hecht, Protein Design: The Choice of de Novo Sequences (1997)

Nov 10, 2025EXHIBITPETITIONER

US Patent No. US7,767,429

Nov 10, 2025EXHIBITPETITIONER

Redline Comparison of the ’731 and ’685 Specifications

Nov 10, 2025EXHIBITPETITIONER

Chao, Structure of Human Hyaluronidase-1 (2007)

Nov 10, 2025EXHIBITPETITIONER

WO/2010/077297, published July 8, 2010

Nov 10, 2025EXHIBITPETITIONER

Stern, The Hyaluronidases: Their Genomics, Structures, & Mechanisms (2006)

Nov 10, 2025EXHIBITPETITIONER

Jedzrejas, Structures of Vertebrate Hyaluronidases (2005)

Nov 10, 2025EXHIBITPETITIONER

Mihel, PSAIA – Protein Structure and Interaction Analyzer (2008)

Nov 10, 2025EXHIBITPETITIONER

Zhang, Hyaluronidase Activity of Human Hyal1 (2009)

Nov 10, 2025EXHIBITPETITIONER

Arming, In vitro Mutagenesis of PH-20 Hyaluronidase from Human Sperm (1997)

Nov 10, 2025EXHIBITPETITIONER

Bordoli, Protein Structure Homology Modeling Using SWISSMODEL (2008)

Nov 10, 2025EXHIBITPETITIONER

Frost, Recombinant Human Hyaluronidase (rHuPH20) (2007)

Nov 10, 2025EXHIBITPETITIONER

Branden & Tooze, Introduction to Protein Structure (1999) Part 1

Nov 10, 2025EXHIBITPETITIONER

Branden & Tooze, Introduction to Protein Structure (1999) Part 2

Nov 10, 2025EXHIBITPETITIONER

Table Associating ’685 Patent to Corresponding ’731 Application

Nov 10, 2025EXHIBITPETITIONER

Steipe, Consensus-Based Engineering of Protein Stability (2004)

Nov 10, 2025EXHIBITPETITIONER

Green, Computer Graphics, Homology Modeling, and Bioinformatics (2010)

Nov 10, 2025EXHIBITPETITIONER

Chica, Semi-rational Approaches to Engineering Enzyme Activity (2005)

Nov 10, 2025EXHIBITPETITIONER

Hardy Assessment of Contraceptive Vaccines Based on Recombinant Mouse Sperm

Nov 10, 2025EXHIBITPETITIONER

Pomering, Restricted Entry of IgG (2002)

Nov 10, 2025EXHIBITPETITIONER

Baba, Mouse Sperm Lacking Cell Surface Hyaluronidase PH-20 (2002)

Nov 10, 2025EXHIBITPETITIONER

Primakoff, Reversible Contraceptive Effect of PH-20 Immunization (1997)

Nov 10, 2025EXHIBITPETITIONER

Tung, Mechanism of Infertility in Male Guinea Pigs Immunized with Sperm

Nov 10, 2025EXHIBITPETITIONER

Rosengren, Recombinant Human PH20 (2018)

Nov 10, 2025EXHIBITPETITIONER

U.S. Patent No. 9,447,401

Nov 10, 2025EXHIBITPETITIONER

Sievers, Fast, Scalable Generation of High-Quality Protein (2011)

Nov 10, 2025EXHIBITPETITIONER

U.S. Patent Application No. 13/694,731

Nov 10, 2025EXHIBITPETITIONER

Ruan, Design & Characterization of a Protein Fold Switching Network (2023)

Nov 10, 2025EXHIBITPETITIONER

2024 Chemistry Nobel Prize Background

Nov 10, 2025EXHIBITPETITIONER

Alexander, A Minimal Sequence Code for Switching Protein Structure (2009)

Nov 10, 2025EXHIBITPETITIONER

Gmachl, The Human Sperm Protein PH-20 Has Hyaluronidase Activity (1993)

Nov 10, 2025EXHIBITPETITIONER

He, NMR Structures of Two Designed Proteins with High Sequence Identity

Nov 10, 2025EXHIBITPETITIONER

Sills, “Retraction,” Science, 319:569 (2008)

Nov 10, 2025EXHIBITPETITIONER

Yue, Loss of Protein Structure Stability as a Major Causative Factor (2005)

Nov 10, 2025EXHIBITPETITIONER

Alberts, Molecular Biology of the Cell, Chapter 3 (2007)

Nov 10, 2025EXHIBITPETITIONER

Wang & Moult, SNPs, Protein Structure, and Disease (2001)

Nov 10, 2025EXHIBITPETITIONER

Marković-Housley, Crystal Structure of Hyaluronidase (2000)

Nov 10, 2025EXHIBITPETITIONER

“Negative Results,” Nature: Editorials, 453:258 (2008)

Nov 10, 2025EXHIBITPETITIONER

Lins, Analysis of Accessible Surface of Residues in Proteins (2003)

Nov 10, 2025EXHIBITPETITIONER

Hayden, Chemistry: Designer Debacle (2008)

Nov 10, 2025EXHIBITPETITIONER

Benkert, Toward the Estimation of the Absolute Quality (2010)

Nov 10, 2025EXHIBITPETITIONER

Schwede, SWISS-MODEL: An Automated Protein Homology-Modeling Server (2003)

Nov 10, 2025EXHIBITPETITIONER

Declaration of Jeffrey P. Kushan

Nov 10, 2025EXHIBITPETITIONER

Petition for Post Grant Review

Nov 10, 2025PAPERPETITIONER

Petitioner's Power of Attorney

Nov 10, 2025PAPERPETITIONER

Declaration of Dr. Michael Hecht

Nov 10, 2025EXHIBITPETITIONER

Swiss Model Printout of PH20 Model with E324A Mutation

Nov 10, 2025EXHIBITPETITIONER

Swiss Model Printout of PH20 Model with E324H Mutation

Nov 10, 2025EXHIBITPETITIONER

Swiss Model Printout of PH20 Model with E324S Mutation

Nov 10, 2025EXHIBITPETITIONER