SynAffix B.V. vs. HANGZHOU DAC BIOTECH CO., LTD.

Explore the PTAB proceeding IPR2022-01531 filed by SynAffix B.V. on 2023-02-09. This includes filing dates, application numbers, tech centers, patent numbers, and current case status.

Proceeding Overview

Proceeding Number

IPR2022-01531

Filing Date

2023-02-09

Accorded Filing Date

2023-02-09

Institution Decision Date

2024-08-30

Last Modified Date

2025-11-03

Proceeding Type

IPR

Termination Date

2025-08-26

Trial Status

Final Written Decision

Parties & Counsel

Petitioner

SynAffix B.V.

Represented By

Houston, Mikeet al

Patent Owner / Respondent

HANGZHOU DAC BIOTECH CO., LTD.

Represented By

Cerrito, Franciset 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 14432073

Respondent Patent Number 10131682

External Links

Espacenet

Google Patents

Respondent Inventor R. Yongxin Zhao

Respondent Tech Center TC 1600 - Biotechnology & Organic Chemistry

Address and Attorney/Agent Information

22 Registered Practitioners

Power of Attorney & Correspondence

Firm / Entity Name BUCHANAN, INGERSOLL & ROONEY PC

Customer Number 21839

Address 1700 K St. N.W., Suite 300, Washington, DC, 20006-3807, UNITED STATES

Attorney / Agent Information

Reg #	Name	Phone
32886	Martin Belisario	215-965-1330
33096	Charles Wieland Iii	215-965-1305
35039	Clark Jablon	215-965-1293
44387	Ronald Ventola Ii	215-965-1390
44457	Jeffrey Gluck	215-965-1330
50433	Christopher North	215-965-1276
51147	Erin Dunston	215-965-1291
51283	Fang Liu	215-965-1280
51519	Dennis Butler	215-965-1282
51864	Sandra Katz	215-965-1344
52225	John Simmons	302-394-6001
56723	Travis Bliss	302-394-6002
62308	George Wu	215-965-1330
62604	Jennifer Wilson	703-299-6961
63206	Stephen Murray	215-965-1307
67772	Ragi Elias	215-965-1221
67781	Keith Jones	215-965-1379
69532	Stephany Small	302-394-6010
78157	Sean Douglass	215-965-1232
79309	Ava Lutz	302-394-6022
82246	Ikenna Ejimonyeugwo	302-394-6021
82660	Julianna Hunt	267-664-1408

Proceeding Documents

200

JUDGMENT Final Written Decision Determining Some Challenged Claims Unpatentable Dismissing Patent Owner’s Motion to Exclude Evidence as Moot 35 U.S.C. § 318(a) FINAL

2025-08-26 FILING PARTY: BOARD

Download

Other: Hearing transcript OTHER

2025-07-10 FILING PARTY: BOARD

Download

Patent Owner’s Demonstratives OTHER

2025-06-09 FILING PARTY: PATENT OWNER

Download

2048

Patent Owner's Demonstratives Exhibit

2025-06-09 FILING PARTY: PATENT OWNER

Download

1092

Petitioner Demonstratives Exhibit

2025-06-09 FILING PARTY: PETITIONER

Download

SynAffix B.V. vs. HANGZHOU DAC BIOTECH CO., LTD.

Proceeding Overview

Parties & Counsel

Petitioner

SynAffix B.V.

Represented By

Patent Owner / Respondent

HANGZHOU DAC BIOTECH CO., LTD.

Represented By

Tribunal & Venue

Patent Information

Address and Attorney/Agent Information

Power of Attorney & Correspondence

Attorney / Agent Information

Proceeding Documents

JUDGMENT Final Written Decision Determining Some Challenged Claims Unpatentable Dismissing Patent Owner’s Motion to Exclude Evidence as Moot 35 U.S.C. § 318(a) FINAL

Other: Hearing transcript OTHER

Patent Owner’s Demonstratives OTHER

Patent Owner's Demonstratives Exhibit

Petitioner Demonstratives Exhibit

Petitioner Updated Exhibit List NOTICE

Patent Owner's Current Exhibit List NOTICE

Notice: Petitioner's LEAP request GRANTED (Jolene S. Fernandes) NOTICE

Patent Owner's Reply ISO Motion to Exclude REPLY

Petitioner's Opposition To Patent Owner's Motion To Exclude OPPOSITION

Patent Owner's Motion to Exclude Evidence MOTION

Petitioner's Updated Exhibit List NOTICE

Ex. 1090 - WO 2019-191728 Exhibit

Ex. 1089 - Axup, Synthesis of site-specific antibody-drug Exhibit

Ex. 1091 - Deposition Transcript of Lawrence Nathan Tumey Exhibit

Petitioner's Sur-Sur-Reply To Patent Owner's Sur-Reply OTHER

E-mail authorizing modification of due dates Exhibit

Petitioner's Second Notice of Deposition of Lawrence Nathan Tumey, Ph.D. NOTICE

Order: Setting Oral Argument ORDER

Sheila Baker PhD. 4-9-2025 Deposition Transcript Exhibit

Petitioner Updated Exhibit List NOTICE

EPO Boards of Appeal Final Decision re European Counterpart to 682 Patent Exhibit

E-mail authorizing entry of EPO decision and deposition transcript Exhibit

Deposition of Ravi Chari Exhibit

Patent Owner’s Sur-Reply to Petition for Inter Partes Review of U.S. Patent No. 10,131,682 OTHER

Declaration of Dr. Lawrence Nathan Tumey in Support of Patent Owner’s Sur-Reply Exhibit

Patent Owner's Power of Attorney NOTICE

Patent Owner's Updated Mandatory Notices NOTICE

Petitioner And Patent Owner Joint Request for Oral Argument OTHER

Order: ORDER Conduct of the Proceeding Authorizing Filng of Additional Evidence and Briefing Declaration ORDER

Patent Owner's Notice of Deposition of Dr. Sheila Baker NOTICE

Patent Owner's Second Notice of Deposition of Dr. Ravi Chari NOTICE

Patent Owner’s Second Notice of Objections to Evidence OTHER

Ponchon et al. Encapsidation and transfer of phage DNA into host cells From in vivo to single particles studies Exhibit

Reply Declaration of Dr. Ravi Chari Exhibit

Yu et al. Synthesis and Biological Activities of a 3'-Azido Analogue of Doxorubicin Against Drug-Resistant Cancer Cells Exhibit

Meldal et al. Cu-Catalyzed Azide-Alkyne Cycloaddition Chem Exhibit

Declaration Of Dr. Sheila Baker Exhibit

Nakamura et al. Water-soluble Taxol Conjugates with Dextran and Targets Tumor Cells by Folic Acid Immobilization Exhibit

Nairn et al., Development of Copper-Catalyzed Azide−Alkyne Cycloaddition for Increased in Vivo Efficacy of Interferon β‑1b by Site-Specific PEGylation Exhibit

Huang et al. Copper-free click conjugation of methotrexate to a PAMAM dendrimer platform Exhibit

Wang et al. Binding of Serum Albumin on Tumor Cells and Characterization of the Albumin Binding Protein Exhibit

Diagram of Chemical Structure Exhibit

Decision Granting Rehearing in IPR2022-01531 Exhibit

Petitioner's Updated Exhibit List NOTICE

George et al. Taxol Photoaffinity Labels 2. Synthesis and Biological Evaluation Exhibit

Wang et al. Rapid Assembly of Matrix Metalloprotease Inhibitors Using Click Chemistry Exhibit

European Patent Specification EP 2 922 818 B1 patent Exhibit

Wang et al., Bioconjugation by Copper(I)-Catalyzed Azide-Alkyne [3 + 2] Cycloaddition Exhibit

Diagram of Chemical Structure Exhibit

Petitioner Reply to Patent Owner Response REPLYTOOPP

Auxiliary Request 6 - redline Exhibit

Lamarque et al. Copper catalyzed 1,3-dipolar cycloaddition reaction of azides with N-(2-trifluoroacetylaryl)propargylamines A mild entry to novel 1,4-disubstituted-[1,2,3]-triazole derivatives Exhibit

Auxiliary Request 6 - clean Exhibit

Lawrence Nathan Tumey, PhD. 2-25-2025 Deposition Transcript Exhibit

EPO Board Decision Exhibit

Jamur et al. Cell Fixatives for Immunostaining Chapter 8 Exhibit

Diagram of Chemical Structure Exhibit

Dondoni et al. A New Ligation Strategy for Peptide and Protein Glycosylation Photoinduced Thiol–Ene Coupling Exhibit

Appeal minutes Exhibit

International Publication No. WO 02/087497 A2 (LI, Chun) Exhibit

Petitioner’s Notice of Deposition of Lawrence Nathan Tumey, Ph.D. NOTICE

Petitioner’s Revised Notice of Deposition of Lawrence Nathan Tumey, Ph.D. NOTICE

Ex. 2040 part 3 of 3 Exhibit

Ex. 2044 Exhibit