90/016,296FLOW CYTOMETER11,703,443Open

Status

Determination - Reexamination Ordered

Filed

Jun 2, 2026

Last Updated

Aug 28, 2026

Art Unit

3992

Requester Law Firm

Unknown

Requested By

Third Party

Sector (CPC)

GPhysics & Instruments
G01Measuring & Testing
G01NMaterial Analysis

USPC

250Radiant Energy

Reexam History (22 events)

Aug 28, 2026MREXORX - Mail Ex Parte Request for Reexamination Granted
Aug 26, 2026RCCPRX - Concurrent Proceedings Notice
Jul 21, 2026MRILDRX - Mail Improper Letter Destroyed
Jun 30, 2026RXPET.Receipt of Petition in a Reexam
Jun 30, 2026RXC/SRCertificate of Service
Jun 4, 2026MRXNReexamination Formalities Notice Mailed
Jun 4, 2026MRXNReexamination Formalities Notice Mailed
Jun 4, 2026DOCKCase Docketed to Examiner in GAU
Jun 4, 2026COMPApplication Is Now Complete
Jun 3, 2026RXPCOMCompletion of Preprocessing - Released to Assigned GAU
Jun 2, 2026RXOSUB.RReexamination requested by third party requester
May 21, 2026RXRLFReExam Litigation Found
May 21, 2026RXLITSRReexam Litigation Search Conducted
May 21, 2026PRXRParalegal Reexam Review Complete
May 21, 2026FTFIFITF set to NO - revise initial setting
May 15, 2026WIDSInformation Disclosure Statement (IDS) Filed
May 15, 2026RXOSUB.RReexamination requested by third party requester
May 15, 2026RXOSUBReceipt of Original Ex Parte Reexam Request
May 15, 2026RXIDS.RReexam - Information Disclosure Statement Filed by Third Party Requester
May 15, 2026RXC/SRCertificate of Service
May 15, 2026RXAF/DRReexam - Affidavit(s), Declaration(s) and/or Exhibit(s) Filed by Third Party Requester
May 15, 2026BIG.Entity Status Set To Undiscounted (Initial Default Setting or Status Change)

Prosecution, PTAB & CAFC

PTAB Proceedings (IPR, PGR, CBM, DER)

IPR2025-01319IPRDiscretionary Denial

Petitioner

Cytek Biosciences, Inc.

Petition Filed

Jul 17, 2025

Institution

Nov 20, 2025

Decision

Nov 20, 2025

Terminated

Nov 20, 2025

Federal Circuit (CAFC)

None found

Terminal Disclaimer

None found

Prosecution History

None found

Maintenance Fees

Grant
Jul 18, 2023
3.5-yr
Jan 18, 2027
7.5-yr
Jan 18, 2031
11.5-yr
Jan 18, 2035
Expiry
Nov 4, 2042

Entity Status

Large Entity

Expires

Nov 4, 2042 (16.4 yr remaining)

Assignments

201620172018201920202021202220232024FiledYONG QIN CHENIRIS INTERNATIONAL, INC.BECKMAN COULTER, INC.
AssignmentReel/Frame: 061655/0211Recorded: Nov 4, 2022

From

YONG QIN CHENInventor
Mar 9, 2015

To

IRIS INTERNATIONAL, INC.

AssignmentReel/Frame: 068450/0064Recorded: Aug 30, 2024

From

IRIS INTERNATIONAL, INC.
Jul 20, 2024

To

BECKMAN COULTER, INC.