ZYDUS LIFESCIENCES LIMITED et al. vs. BioMarin Pharmaceutical Inc.

Explore the PTAB proceeding PGR2026-00055 filed by ZYDUS LIFESCIENCES LIMITED et al. on 2026-06-05. This includes filing dates, application numbers, tech centers, patent numbers, and current case status.

Proceeding Overview

Proceeding Number

PGR2026-00055

Filing Date

2026-06-05

Accorded Filing Date

2026-06-05

Institution Decision Date

2026-10-08

Last Modified Date

2026-10-15

Proceeding Type

PGR

Termination Date

2026-10-08

Trial Status

Discretionary Denial

Parties & Counsel

Petitioner

ZYDUS LIFESCIENCES LIMITED et al.

Represented By

Lee, Rogeret al

Patent Owner / Respondent

BioMarin Pharmaceutical Inc.

Represented By

Modi, Naveenet 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 17811748

Respondent Patent Number 12233106

External Links

Espacenet

Google Patents

Respondent Inventor Jonathan Day et al

Respondent Tech Center TC 1600 - Biotechnology & Organic Chemistry

Address and Attorney/Agent Information

15 Registered Practitioners

Power of Attorney & Correspondence

Firm / Entity Name Marshall, Gerstein & Borun LLP (Biomarin)

Customer Number 90849

Address 233 South Wacker Drive, 6300 Willis Tower, Chicago, IL, 60606, UNITED STATES

Attorney / Agent Information

Reg #	Name	Phone
34824	Robert Gerstein	312-474-6300
35302	Greta Noland	312-474-6300
38153	David Gass	312-474-6300
45790	Heather Kissling	312-474-6300
45974	Luisa Bigornia	415-506-6700
48484	Sharon Sintich	312-474-6300
52664	Eric Brusca	312-474-6300
53066	Lynn Janulis	312-474-6300
53379	Katherine Neville	312-474-6300
56301	Jeanne Brashear	312-474-6300
57712	Shelley Danek	312-474-6300
61425	Christopher De Vry	415-842-8040
63549	Michael Allikian	312-474-6300
70948	Anand Viswanathan	415-842-8585
78795	Stefan Brooks	312-474-6300

Proceeding Documents

Notice: refund approved NOTICE

2026-10-15 FILING PARTY: BOARD

Download

Petitioners' Request for Refund OTHER

2026-10-09 FILING PARTY: PETITIONER

Download

Director Discretionary Decision: Deny RESPONSE

2026-10-08 FILING PARTY: BOARD

Download

Opposition to Patent Owner's Request for Discretionary Denial RESPONSE

2026-09-18 FILING PARTY: PETITIONER

Download

Patent Owner's Preliminary Response POPR

2026-09-18 FILING PARTY: PATENT OWNER

Download

ZYDUS LIFESCIENCES LIMITED et al. vs. BioMarin Pharmaceutical Inc.

Proceeding Overview

Parties & Counsel

Petitioner

ZYDUS LIFESCIENCES LIMITED et al. Follow

Represented By

Patent Owner / Respondent

BioMarin Pharmaceutical Inc. Follow

Represented By

Tribunal & Venue

Patent Information

Address and Attorney/Agent Information

Power of Attorney & Correspondence

Attorney / Agent Information

Proceeding Documents

Notice: refund approved NOTICE

Petitioners' Request for Refund OTHER

Director Discretionary Decision: Deny RESPONSE

Opposition to Patent Owner's Request for Discretionary Denial RESPONSE

Patent Owner's Preliminary Response POPR

Patent Owner's Current List of Exhibits NOTICE

Exhibit 2004 Exhibit

Exhibit 2001 Exhibit

Exhibit 2003 Exhibit

Exhibit 2002 Exhibit

Patent Owner's Brief Requesting Discretionary Denial RESPONSE

Patent Owner's Current List of Exhibits NOTICE

Petitioners' Reply to Patent Owner's Opposition to Motion for Joinder REPLY

Petitioners' Reply to Ascendis's Opposition to Motion for Joinder REPLY

Ascendis Pharma's Opposition to Petitioner Zydus Lifesciences Ltd.’s Motion for Joinder NOTICE

E-mail authorizing Ascendis briefing Exhibit

Patent Owner's Opposition to Petitioner Zydus's Motion for Joinder OPPOSITION

Patent Owner's Mandatory Notices NOTICE

Power of Attorney for Patent Owner NOTICE

E-mail authorizing briefing Exhibit

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

EXHIBIT 1051 Exhibit

EXHIBIT 1003 Exhibit

Notice: Power of Attorney (Zydus Lifesciences Global FZE) NOTICE

EXHIBIT 1063 Exhibit

EXHIBIT 1022 Exhibit

EXHIBIT 1043 Exhibit

EXHIBIT 1054 Exhibit

EXHIBIT 1042 Exhibit

EXHIBIT 1018 Exhibit

EXHIBIT 1002 Exhibit

EXHIBIT 1027 Exhibit

EXHIBIT 1064 Exhibit

EXHIBIT 1047 Exhibit

EXHIBIT 1068 Exhibit

EXHIBIT 1012 Exhibit

EXHIBIT 1023 Exhibit

EXHIBIT 1059 Exhibit

EXHIBIT 1048 Exhibit

EXHIBIT 1036 Exhibit

EXHIBIT 1062 Exhibit

EXHIBIT 1046 Exhibit

EXHIBIT 1029 Exhibit

EXHIBIT 1055 Exhibit

EXHIBIT 1007 Exhibit

EXHIBIT 1037 Exhibit

EXHIBIT 1045 Exhibit

EXHIBIT 1013 Exhibit

EXHIBIT 1026 Exhibit

EXHIBIT 1053 Exhibit

EXHIBIT 1006 Exhibit

EXHIBIT 1021 Exhibit

EXHIBIT 1011 Exhibit

EXHIBIT 1069 Exhibit

EXHIBIT 1070 Exhibit

EXHIBIT 1033 Exhibit

EXHIBIT 1058 Exhibit

EXHIBIT 1039 Exhibit

EXHIBIT 1019 Exhibit

EXHIBIT 1071 Exhibit

Petition: as filed PETITION

EXHIBIT 1001 Exhibit

EXHIBIT 1030 Exhibit

EXHIBIT 1035 Exhibit

EXHIBIT 1005 Exhibit

ZYDUS LIFESCIENCES LIMITED et al.

BioMarin Pharmaceutical Inc.