Status
Determination - Reexamination Ordered
Requester
Requester Law Firm
Unknown
Requested By
Third Party
Patent Owner
P.O. Law Firm
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)
IPR2025-01319IPR — Discretionary 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
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.