90/015,918TWO-STEP STI FORMATION PROCESS7,842,577Open

Status

Determination - Reexamination Ordered

Filed

Jan 28, 2026

Last Updated

Mar 4, 2026

Art Unit

3991

Requester Law Firm

Kirkland & Ellis, LLP

Requested By

Third Party

Patent OwnerInferred

Mosaid Technologies Inc.

Sector (CPC)

HElectrical & Electronic
H10Semiconductor Devices
H10DInorganic Semiconductor Devices

USPC

438Semiconductor Device Manufacturing: Process

Reexam History (23 events)

Mar 4, 2026MREXORX - Mail Ex Parte Request for Reexamination Granted
Feb 19, 2026IDSCInformation Disclosure Statement considered
Feb 13, 2026DOCKCase Docketed to Examiner in GAU
Feb 12, 2026MRXNReexamination Formalities Notice Mailed
Feb 12, 2026MRXNReexamination Formalities Notice Mailed
Feb 12, 2026COMPApplication Is Now Complete
Feb 11, 2026RXPCOMCompletion of Preprocessing - Released to Assigned GAU
Feb 11, 2026RXNREQFDNotice of reexamination request filing date
Feb 11, 2026RXNREQAUNotice of assignment of reexamination request
Feb 9, 2026RXTTLRPTTitle Report
Feb 2, 2026RXRLFReExam Litigation Found
Feb 2, 2026RXLITSRReexam Litigation Search Conducted
Jan 30, 2026PRXRParalegal Reexam Review Complete
Jan 30, 2026FTFIFITF set to NO - revise initial setting
Jan 28, 2026WIDSInformation Disclosure Statement (IDS) Filed
Jan 28, 2026RXRLFReExam Litigation Found
Jan 28, 2026RXPA..RReexam - Change in Power of Attorney (May Include Associate POA) for Third Party Requester
Jan 28, 2026RXOSUB.RReexamination requested by third party requester
Jan 28, 2026RXOSUBReceipt of Original Ex Parte Reexam Request
Jan 28, 2026RXIDS.RReexam - Information Disclosure Statement Filed by Third Party Requester
Jan 28, 2026RXC/SRCertificate of Service
Jan 28, 2026RXAF/DRReexam - Affidavit(s), Declaration(s) and/or Exhibit(s) Filed by Third Party Requester
Jan 28, 2026BIG.Entity Status Set To Undiscounted (Initial Default Setting or Status Change)

Prosecution, PTAB & CAFC

PTAB Proceedings (IPR, PGR, CBM, DER)

None found

Federal Circuit (CAFC)

None found

Terminal Disclaimer

None found

Prosecution History

None found

Maintenance Fees

Grant
Nov 30, 2010
3.5-yr
May 30, 2014
7.5-yr
May 30, 2018
Paid May 17, 2018
11.5-yr
May 30, 2022
Paid May 18, 2022
Expiry
Oct 22, 2028

Entity Status

Large Entity

Expires

Oct 22, 2028 (2.6 yr remaining)

Term Adjustment

+148 days (~0.4 yr)

Assignments

20092010201120122013201420152016201720182019202020212022FiledKA-HING FUNGTAIWAN SEMICONDUCTOR MANUFACTURING COMPANY, LTD.MOSAID TECHNOLOGIES INC.
AssignmentReel/Frame: 021017/0029Recorded: May 29, 2008

From

KA-HING FUNGInventor
May 26, 2008

To

TAIWAN SEMICONDUCTOR MANUFACTURING COMPANY, LTD.

AssignmentReel/Frame: 060024/0288Recorded: May 26, 2022

From

TAIWAN SEMICONDUCTOR MANUFACTURING COMPANY LTD.
Apr 28, 2022

To

MOSAID TECHNOLOGIES INC.