Merck Sharp & Dohme LLC vs. Halozyme, Inc. et al.

Explore the PTAB proceeding PGR2025-00087 filed by Merck Sharp & Dohme LLC on 2025-11-10. This includes filing dates, application numbers, tech centers, patent numbers, and current case status.

Proceeding Overview

Proceeding Number

PGR2025-00087

Filing Date

2025-11-10

Accorded Filing Date

2025-11-10

Institution Decision Date

2026-05-15

Last Modified Date

2026-09-22

Proceeding Type

PGR

Termination Date

2026-05-15

Trial Status

Discretionary Denial

Parties & Counsel

Petitioner

Merck Sharp & Dohme LLC

Represented By

Kushan, Jeffreyet al

Patent Owner / Respondent

Halozyme, Inc. et al.

Represented By

Ellison, Eldoraet 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 18340786

Respondent Patent Number 12371685

External Links

Espacenet

Google Patents

Respondent Inventor Ge WEI et al

Respondent Tech Center TC 1600 - Biotechnology & Organic Chemistry

Address and Attorney/Agent Information

104 Registered Practitioners

Power of Attorney & Correspondence

Firm / Entity Name Morgan, Lewis & Bockius LLP (PH)

Customer Number 28977

Address 2222 Market Street, Philadelphia, PA, 19103, UNITED STATES

Attorney / Agent Information

Reg #	Name	Phone
31066	Gary Williams	650-843-7501
37386	Michael Lyons	650-843-7507
39266	Soyeon Laub	714-830-0512
39951	Douglas Crisman	650-843-4000
40506	Louis Beardell Jr	215-963-5067
41040	Robert Goodell	202-739-5549
41796	Andrew Gray Iv	650-843-4000
42223	Jason White	312-321-4200
42813	Brett Lovejoy	415-442-1211
42837	Jeffry Mann	415-442-1000
43378	Collin Park	202-739-3000
44146	Brent Hawkins	415-442-1000
45645	Dion Bregman	650-843-4000
46692	Ramyar Farid	202-739-5195
50801	Robert Smyth	202-739-5139
50862	Ahren Hsu-Hoffman	650-843-4000
50891	Jeffrey Killian	202-739-5592
51793	Mark Hayman	617-951-8440
53615	Nathan Smith	949-757-6018
55202	Jason Gettleman	650-843-7593
55293	Ari Indik	215-864-7138
56890	Christopher Betti	312-324-1449
57765	Yalei Sun	650-843-7558
58729	Louis-Vu Nguyen	415-442-1303
58752	John Hemmer	215-963-4816
59462	Brad Wilson	312-324-1103
59649	Tae Woong Koo	650-843-7246
60472	M. Hales	714-830-0514
60711	Richard Leung	215-963-5082
61841	Kenneth Cheney	714-830-0526
63115	Michael Ryan	610-574-1318
63133	Stephen Altieri	617-951-8525
63328	Clay Hawes	7034154864
64526	Janice Logan	202-439-5234
65210	Christina Macdougall	415-442-1277
65452	Kelly Plummer	312-324-1490
65592	Liying Sun	650-843-7215
66838	Jianbai Wang	650-843-7843
67084	Maria Doukas	312-324-1454
67908	Yingying Zhou	415-442-1214
67961	Tairan Wang	202-739-5119
68345	Danny Mansour	714-830-0600
68487	Alia Orbin	610-390-7234
69096	Toyomi Ohara	202-739-3000
69232	Rachna Ram	510-524-1579
69316	Byung Cheol Kwak	617-341-7264
69333	Hosang Lee	202-937-5142
70067	Sujohn Das	713-890-5792
70236	Kalpesh Upadhye	202-739-5157
70711	Benjamin Pezzner	650-843-4000
70871	Andrew Antczak	215-963-5000
71054	Yon Sohn	858-587-1121
71064	David Bernstein	650-843-4000
71076	Wan-Shoon Lo	312-984-5810
71397	Alexander Stein	650-843-7278
71751	Moreshwar Vaze	617-341-7952
71783	Nicholas Restauri	312-324-1000
72445	Jianke Kang	202-739-5183
73464	Hang Zheng	202-585-8307
73683	Amanda Williamson	312-324-1450
73696	Chantal Edde	215-963-5656
74139	Ka Lo Yeh	650-843-7815
74539	Sadie Knight	415-442-1000
74630	Victor Ghidu	215-963-5719
75253	Alyssa Pugh	215-963-5070
75470	Sara Sims	215-963-5630
75669	Andrew Dietrick	570-906-0745
75688	Emily Coury	617-341-7818
75724	Alexandra Koseva	650-843-7211
75810	Matthew Walker	206-274-6374
75815	Catherine Chou	650-843-4000
76003	Drew Bennett	617-341-7833
76140	Alexandria Petterson	650-843-7841
76203	Calvin Brien	202-739-5167
76671	Andrew Devkar	310-255-9070
77267	Ai Leen Koh	650-843-7823
77446	Theodore Rand	650-843-7275
77698	Phillip Wolfe	215-963-5454
77918	Alicia Fraind	215-972-8594
77996	Min Woo Park	202-673-95697
78072	Conor Ball	415-442-1668
78272	Sandhal Olds	765-618-4658
79029	Alexander Harrison	404-815-6046
79060	Kannan Narayanan	408-685-3658
79300	Evelyn Chou	415-442-1609
79663	Kathryn Chesnick	570-878-2384
79760	Xiaoqian Li	650-843-7853
79839	Peter Loderup	714-830-0517
79856	Timmy Lee	650-843-7517
80363	Yuqi Li	215-564-3236
80469	Alec Mandell	650-843-7228
80622	Corey Moore	617-341-7852
80944	Hye Hyun Ahn	202-434-7300
81040	Eunjean Je	202-739-5929
81210	Hayley Reed	215-963-4957
81433	Kurosu Altaf	650-843-7233
81482	Pablo Herrera Jr.	650-843-7512
81484	Samantha Kuo	714-579-5530
81604	Xinming Zhang	415-442-1392
81935	Jia Jie Tang	617-951-8000
81982	Corine Martineau	215-963-5030
82004	Isabella Couture	316-680-1931
82139	Xuedong Zhu	857-333-6217
82373	Alyssa Galvin	202-739-5786

Proceeding Documents

182

Notice of refund NOTICE

2026-09-22 FILING PARTY: BOARD

Download

Petitioner's Request for Refund OTHER

2026-09-15 FILING PARTY: PETITIONER

Download

3001

PHV NOI for Zachariah Summers Exhibit

2026-05-27 FILING PARTY: BOARD

Download

Director Discretionary Decision: Deny RESPONSE

2026-05-15 FILING PARTY: BOARD

Download

Patent Owner's Updated Power of Attorney NOTICE

2026-05-13 FILING PARTY: PATENT OWNER

Download

Merck Sharp & Dohme LLC vs. Halozyme, Inc. et al.

Proceeding Overview

Parties & Counsel

Petitioner

Merck Sharp & Dohme LLC

Represented By

Patent Owner / Respondent

Halozyme, Inc. et al.

Represented By

Tribunal & Venue

Patent Information

Address and Attorney/Agent Information

Power of Attorney & Correspondence

Attorney / Agent Information

Proceeding Documents

Notice of refund NOTICE

Petitioner's Request for Refund OTHER

PHV NOI for Zachariah Summers Exhibit

Director Discretionary Decision: Deny RESPONSE

Patent Owner's Updated Power of Attorney NOTICE

Patent Owner's Updated Exhibit List NOTICE

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

EX2214 - Summers PTAB Declaration Exhibit

Patent Owner's Updated Mandatory Notices NOTICE

Patent Owner's Third Motion to Seal MOTION

Merck & Co., Inc. Subsidiaries (Dec. 31, 2024) Exhibit

MERCK_PGR00458 - PTAB-PGR2021-00036-16 Merck-Genentech PGR Exhibit

Petitioner's Motion to Seal MOTION

State of New Jersey, Certificate of Long Form Standing with Officers and Directors, Merck & Co., Inc. (Feb. 18, 2026) Exhibit

Company Statement: “Merck Sues Merck KGaA, Darmstadt, Germany for Improper Use of “Merck”” (Jan. 15, 2016) Exhibit

Merck & Co., Inc., Form 8-K (Nov. 4, 2009) Exhibit

MERCK_PGR00090 - DNJ-2-25-cv-03179 2025-07-14 [019] Corporate Disclosure Statement Exhibit

MERCK_PGR00094 - DNJ-2-25-cv-03179 Stipulation to Substitute Parties Exhibit

Press Release: “Merck and Schering-Plough to Merge” (Mar. 9, 2009) Exhibit

2026-3-12 Email RE: Merck v. Halozyme PGRs – Request for Board Clarification Exhibit

MERCK_PGR00355 - PTAB-PGR2021-00036-1 Merck-Genentech PGR Exhibit

Table Comparing the Boards of Directors for Merck & Co., Inc. and Merck Sharp & Dohme LLC Exhibit

State of New Jersey, Certificate of Long Form Standing with Officers and Directors, Merck Sharp & Dohme LLC (Feb. 18, 2026) Exhibit

Petitioner's Preliminary Reply OTHER

MSD Netherlands Capital B.V., Preliminary Prospectus Supplement (May 14, 2024) Exhibit

MERCK_PGR00462 - RE_ 2_25-cv-03179-ES-JRA_ HALOZYME, INC. v. MERCK SHARP & DOHME CORP. Exhibit

Declaration of Kelly Grez Exhibit

E-mail authorizing briefing Exhibit

Email Correspondence Exhibit

EX2466 - Merck Form 8K Exhibit

EX2465 - Merck OED Search Exhibit

EX2467 - Merck Form 8K Exhibit 99.1 - Press Release Exhibit

EX2449 - LinkedIn Exhibit

EX2401 - E-mail (PUBLIC - REDACTED) Exhibit

EX2460 - MSD Bio Exhibit

EX2472 - Merck Press Release Exhibit

Patent Owner's Preliminary Response (PUBLIC - REDACTED) OTHER

EX2453 - 2025-09-30 MSD SEC FORM 13F-NT Exhibit

EX2471 - 12-15-2025 Email from Kushan to Powers Exhibit

Patent Owner's Second Motion to Seal MOTION

EX2473 - File History for US Appl No. 19346638 Exhibit

EX2462 - 2024 MSD LLC Schedule 13D Exhibit

EX2461 - OED Search Exhibit

EX2450 - OED PTO Form 158 Exhibit

EX2474 - Merck Patents Webpage Exhibit

EX2447 - IPO Board of Directors Exhibit

EX2457 - Sarbanes-Oxley Act 2002 Exhibit

EX2452 - 2025-09-30 Merck Co SEC FORM 13F-HR Exhibit

EX2459 - NJ Rules of Professional Conduct Exhibit

EX2458 - Merck Co Bio Exhibit

EX2469 - ICANN - MSD.com Web Registration Lookup Exhibit

EX2463 - 2025 Merck Schedule 14A Proxy Statement Exhibit

EX2464 - SEC Form 13F Exhibit

EX2468 - Exhibit 99.2 to Form 8-K, Merck & Co. Inc., February 3, 2026 Exhibit

EX2454 - Merck Co June 2025 Form 10-Q Exhibit

EX2456 - Merck 2024 Form 10K Exhibit 24.1 Exhibit

EX2470 - ICANN - Merck.com Web Registration Lookup Exhibit

EX2448 - ChIPs - Speaker Details Exhibit

EX2451 - Employment Letter Exhibit

EX2446 - Amicus Brief Exhibit

MERCK_PGR00355 - PTAB-PGR2021-00036-1 Merck- Genentech PGR Exhibit

Petitioner's Opposition to Patent Owner's Motion for Additional Discovery OPPOSITION

MERCK_PGR00458 - PTAB-PGR2021-00036-16 Merck- Genentech PGR Exhibit

MERCK_PGR00090 - DNJ-2-25-cv-03179 2025-07-14 [019] Corporate Disclosure Statement Exhibit

MERCK_PGR00462 - RE_ 2_25-cv-03179-ES-JRA_ HALOZYME, INC. v. MERCK SHARP & DOHME CORP. Exhibit