Status
Determination - Reexamination Ordered
Requester
Unknown
Requester Law Firm
Unknown
Requested By
Third Party
Patent OwnerInferred
P.O. Law Firm
Reexam History (25 events)
Aug 10, 2026MREXORX - Mail Ex Parte Request for Reexamination Granted
Jul 14, 2026MRILDRX - Mail Improper Letter Destroyed
Jun 30, 2026RXPET.Receipt of Petition in a Reexam
Jun 30, 2026RXC/SRCertificate of Service
Jun 15, 2026RXC/SRCertificate of Service
Jun 9, 2026DOCKCase Docketed to Examiner in GAU
Jun 8, 2026MRXNReexamination Formalities Notice Mailed
Jun 8, 2026MRXNReexamination Formalities Notice Mailed
Jun 8, 2026COMPApplication Is Now Complete
Jun 5, 2026RXPCOMCompletion of Preprocessing - Released to Assigned GAU
Jun 5, 2026FTFIFITF set to NO - revise initial setting
Jun 4, 2026RXNREQFDNotice of reexamination request filing date
Jun 4, 2026RXNREQAUNotice of assignment of reexamination request
Jun 3, 2026PRXRParalegal Reexam Review Complete
May 16, 2026RXTTLRPTTitle Report
May 16, 2026RXRLFReExam Litigation Found
May 16, 2026RXLITSRReexam Litigation Search Conducted
May 15, 2026WIDSInformation Disclosure Statement (IDS) Filed
May 15, 2026RXPA..RReexam - Change in Power of Attorney (May Include Associate POA) for Third Party Requester
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)
PGR2025-00088PGR — Discretionary Denial
Petitioner
Cytek Biosciences, Inc.
Petition Filed
Sep 23, 2025
Institution
Mar 17, 2026
Decision
Mar 17, 2026
Terminated
Mar 17, 2026
Federal Circuit (CAFC)
None found
Terminal Disclaimer
None found
Prosecution History
None found
Maintenance Fees
Grant
Dec 24, 2024
3.5-yr
Jun 24, 2028
7.5-yr
Jun 24, 2032
11.5-yr
Jun 24, 2036
Expiry
Sep 3, 2044
Entity Status
Large Entity
Expires
Sep 3, 2044 (18.2 yr remaining)
Assignments
AssignmentReel/Frame: 068475/0688Recorded: Sep 3, 2024
From
YONG QIN CHENInventor
Mar 9, 2015
→
To
IRIS INTERNATIONAL, INC.
AssignmentReel/Frame: 068475/0716Recorded: Sep 3, 2024
From
IRIS INTERNATIONAL, INC.
Jul 20, 2024
→
To
BECKMAN COULTER, INC.