Cytek Biosciences, Inc. vs. Beckman Coulter, Inc. et al.

Explore the PTAB proceeding IPR2025-01319 filed by Cytek Biosciences, Inc. on 2025-07-17. This includes filing dates, application numbers, tech centers, patent numbers, and current case status.

Proceeding Overview

Proceeding Number

IPR2025-01319

Filing Date

2025-07-17

Accorded Filing Date

2025-07-17

Institution Decision Date

2025-11-20

Last Modified Date

2026-03-27

Proceeding Type

IPR

Termination Date

2025-11-20

Trial Status

Discretionary Denial

Parties & Counsel

Petitioner

Cytek Biosciences, Inc.

Represented By

Knight, Dustinet al

Patent Owner / Respondent

Beckman Coulter, Inc. et al.

Represented By

Cohen, Alexiset al

Tribunal & Venue

Tribunal

Patent Trial and Appeal Board (USPTO)

Technology Center

TC 2800 - Semiconductors, Electrical & Optical Systems

Patent Information

1 Patent Involved

Respondent Application Number 17980669

Respondent Patent Number 11703443

External Links

Espacenet

Google Patents

Respondent Inventor Yong Qin Chen

Respondent Tech Center TC 2800 - Semiconductors, Electrical & Optical Systems

Address and Attorney/Agent Information

14 Registered Practitioners

Power of Attorney & Correspondence

Firm / Entity Name NORTON ROSE FULBRIGHT US LLP - BCI

Customer Number 129381

Address 98 San Jacinto Blvd., Suite 1100, Austin, TX, 78701, UNITED STATES

Attorney / Agent Information

Reg #	Name	Phone
36675	Karen Shannon	312-405-0186
38159	Mony Ghose	201-847-6802
41333	Michael Stimson	210-286-6968
42203	Rutherford Viguet	214-855-8185
44699	Mark Garrett	512-474-5201
45104	Gina Shishima	512-536-3081
53429	Hema Pande	714-773-7606
54327	Anne Murphy	952-368-2048
58288	Michael Bell	714-488-7119
59891	Garrett Barten	516-241-5915
61650	Daniel Keys	949-551-1066
64961	William Wong	949-878-2481
68987	Uyen Tang	714-961-4310
72871	Michael Pohl	512-536-3113

Proceeding Documents

200

Notice: refund approved NOTICE

2026-03-27 FILING PARTY: BOARD

Download

Petitioner's Request for Refund of Post-Institution Fees OTHER

2026-03-25 FILING PARTY: PETITIONER

Download

Director Discretionary Decision: Deny RESPONSE

2025-11-20 FILING PARTY: BOARD

Download

Patent Owner’s Reply to Petitioner’s Opposition of Discretionary Denial OTHER

2025-11-18 FILING PARTY: PATENT OWNER

Download

2041

Cytek’s Election of Asserted Prior Art Grounds Exhibit

2025-11-18 FILING PARTY: PATENT OWNER

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Cytek Biosciences, Inc. vs. Beckman Coulter, Inc. et al.

Proceeding Overview

Parties & Counsel

Petitioner

Cytek Biosciences, Inc.

Represented By

Patent Owner / Respondent

Beckman Coulter, Inc. et al.

Represented By

Tribunal & Venue

Patent Information

Address and Attorney/Agent Information

Power of Attorney & Correspondence

Attorney / Agent Information

Proceeding Documents

Notice: refund approved NOTICE

Petitioner's Request for Refund of Post-Institution Fees OTHER

Director Discretionary Decision: Deny RESPONSE

Patent Owner’s Reply to Petitioner’s Opposition of Discretionary Denial OTHER

Cytek’s Election of Asserted Prior Art Grounds Exhibit

Email Correspondence Exhibit

Shapiro, Practical Flow Cytometry (2003) – Part 1 Exhibit

Arumugam, 57 Pramana J. Physics 849 (2001) Exhibit

Azadeh, Fiber Optics Engineering (2009) Exhibit

Shapiro, Practical Flow Cytometry (2003) – Part 2 Exhibit

Saleh, Fundamentals of Photonics 2d. Ed. 2007 Exhibit

Declaration of David Schaafsma, Ph.D. Exhibit

Telecomm Standardization Sector of ITU, Recommendation G.694.1 (June 2002) Exhibit

Chen, U.S. Patent No. 10,330,582 Exhibit

Nebeling, Fiber Network Engineering (July 3, 2002) Exhibit

Patent Owner's Preliminary Response POPR

Telecomm Standardization Sector of ITU, Recommendation G.694.2 (Dec. 2003) Exhibit

Welford, Optics (3d ed. 1990) Exhibit

Smith, Modern Optical Engineering (3d ed. 2000) Exhibit

Denial of Request for Ex Parte Reexam Control Number 90/015,441 (Oct. 6, 2025) Exhibit

Petitioner's Opposition to PO's Request for Discretionary Denial RESPONSE

Cytek Biosciences Debuts New Advanced Flow Cytometry System, (June 7, 2017), https://cytekbio.com/blogs/news/cytek-biosciences-debuts-newadvanced-flow-cytometry-system Exhibit

Petitioner's Updated Exhibit List NOTICE

First Amended Complaint filed in Beckman Coulter, Inc. v. Cytek Biosciences, Inc., C.A. No. 1:24-cv-00945 (D. Del. Jan. 9, 2025), D.I. 42 Exhibit

U.S. Patent No. 10,330,582 B2 to Yong Qin Chen (filed June 30, 2017, issued June 25, 2019) Exhibit

Patent Owner's Updated Mandatory Notices NOTICE

Cytek Biosciences, Inc.’s Revised Invalidity Contentions Exhibit

File History for U.S. Patent No. 10,330,582 Exhibit

File History for U.S. Patent No. 9,746,412 Exhibit

EP2861956 Search Opinion (Mar. 18, 2016) Exhibit

Transcript of Scheduling Conference Exhibit

EP2861956 Search Opinion (Mar. 18, 2016) Exhibit

Abstract of Title for U.S. Patent No. 8,605,283 Exhibit

EP3206010B1 Exhibit

DocketNavigator, Time-to-Trial Statistics for District of Delaware (Sept. 2025) Exhibit

Request for Ex Parte Reexamination of U.S. Patent No. 10,330,582 Exhibit

IDS for U.S. Patent No. 10,436,697 (May 7, 2019) Exhibit

Abstract of Title for U.S. Patent No. 8,922,778 Exhibit

File History for U.S. Patent No. 9,746,412 Exhibit

Petition for Post-Grant Review of US Patent No. 12,174,106, PGR2025-00084 Exhibit

File History for U.S. Patent No. 9,746,412 Exhibit

EP3206010B1 Exhibit

Amended Scheduling Order (Sept. 29, 2025) Exhibit

About Beckman Coulter Exhibit

IDS for Application No. 15/817,237 to U.S. Patent No. 10,436,697 (May 7, 2019) Exhibit

Petition for Post-Grant Review of US Patent No. 12,174,107, PGR2025-00088 Exhibit

About Beckman Coulter Exhibit

BD LSRFortessa Cell Analyzer User’s Guide Exhibit

BD LSRFortessa Cell Analyzer User’s Guide Exhibit

Abstract of Title for U.S. Patent No. 8,605,283 Exhibit

IDS for Application No. 15/817,237 to U.S. Patent No. 10,436,697 (May 7, 2019) Exhibit

CytoFLEX Flow Cytometer Exhibit

EP2861956B1 Exhibit

Petition for Post-Grant Review of US Patent No. 12,174,106, PGR2025-00084 Exhibit

File History for U.S. Patent No. 10,330,582 Exhibit

Abstract of Title for U.S. Patent No. 8,922,778 Exhibit

Capewell, U.S. Patent Pub. No. 2004/0165828 Exhibit

IDS for Application No. 15/942,430 to U.S. Patent No. 11,333,597 (June 17, 2021) Exhibit

Cytek Form S-1 Registration Statement (2021) Exhibit

Cytek Opening Brief in Support of Its Motion to Stay Exhibit

EP3206010B1 Exhibit

Cytek Biosciences, Inc.’s Revised Invalidity Contentions Exhibit

Petition for Post-Grant Review of US Patent No. 12,174,106, PGR2025-00084 Exhibit

Capewell, U.S. Patent Pub. No. 2004/0165828 Exhibit

Capewell, U.S. Patent Pub. No. 2004/0165828 Exhibit