Who owns the CITADEL trademark?

The CITADEL trademark is owned by 3dB Labs, Inc..

What class is the CITADEL trademark registered in?

The CITADEL trademark is registered in Class 009 (Electronics, software & scientific instruments).

What is the serial number for CITADEL?

The USPTO serial number for CITADEL is 99169670.

What is the registration number for CITADEL?

CITADEL is registered under USPTO registration number 8452944.

CITADEL - Owned by 3dB Labs, Inc. - (Class 009)

What to file next

Section 8 declaration of continued use

When: Due between the fifth and sixth anniversary of registration.
Extensions and grace: A six-month grace period follows, with an added per-class fee.
If it is missed: A missed Section 8 cancels the registration, and there is no revival route for it.

How the Section 8 deadline works

General information about USPTO practice, not legal advice. The register is the authority, and a filing that has not yet posted can change what is owed.

Full Goods & Services

Class 009Electronics, software & scientific instruments

US codes: 021, 023, 026, 036, 038

First use anywhere: Aug 31, 2025

First use in commerce: Aug 31, 2025

Scientific, research, navigation, surveying, photographic, cinematographic, audiovisual, optical, weighing, measuring, signalling, detecting, testing, inspecting, life-saving and teaching apparatus and instruments; apparatus and instruments for conducting, switching, transforming, accumulating, regulating or controlling the distribution or use of electricity; apparatus and instruments for recording, transmitting, reproducing or processing sound, images or data; recorded and downloadable multimedia files, computer software, blank digital or analogue recording and storage media; mechanisms for coin-operated apparatus; cash registers, calculating devices; computers and computer peripheral devices; diving suits, divers' masks, ear plugs for divers, nose clips for divers, gloves for divers, breathing apparatus for underwater swimming; fire-extinguishing apparatus.

This description is as filed with the USPTO and defines the scope of trademark protection.

Filing Basis & Declarations

Standard Characters ClaimedUse Application CurrentlyTrademark

Status History

21 events

REGISTERED-PRINCIPAL REGISTER

Sep 22, 2026

Code R.PR

NOTICE OF REGISTRATION CONFIRMATION EMAILED

Sep 22, 2026

Code NRCC

ALLOWED PRINCIPAL REGISTER - SOU ACCEPTED

Sep 02, 2026

Code CNPR

NOTICE OF ACCEPTANCE OF STATEMENT OF USE E-MAILED

Sep 02, 2026

Code SUNA

NOTICE OF APPROVAL OF EXTENSION REQUEST E-MAILED

Aug 21, 2026

Code EXRA

SOU EXTENSION 1 GRANTED

Aug 20, 2026

Code EX1G

STATEMENT OF USE PROCESSING COMPLETE

Aug 20, 2026

Code SUPC

CASE ASSIGNED TO INTENT TO USE PARALEGAL

Aug 19, 2026

Code AITU

SOU TEAS EXTENSION RECEIVED

Jun 15, 2026

Code EEXT

SOU EXTENSION 1 FILED

Jun 15, 2026

Code EXT1

USE AMENDMENT FILED

Apr 29, 2026

Code IUAF

TEAS STATEMENT OF USE RECEIVED

Apr 29, 2026

Code EISU

NOA E-MAILED - SOU REQUIRED FROM APPLICANT

Dec 16, 2025

Code NOAM

PUBLISHED FOR OPPOSITION

Oct 21, 2025

Code PUBO

OFFICIAL GAZETTE PUBLICATION CONFIRMATION E-MAILED

Oct 21, 2025

Code NPUB

NOTIFICATION OF NOTICE OF PUBLICATION E-MAILED

Oct 15, 2025

Code NONP

APPROVED FOR PUB - PRINCIPAL REGISTER

Sep 24, 2025

Code CNSA

ASSIGNED TO EXAMINER

Sep 22, 2025

Code DOCK

NEW APPLICATION OFFICE SUPPLIED DATA ENTERED

May 05, 2025

Code NWOS

APPLICATION FILING RECEIPT MAILED

May 05, 2025

Code MAFR

NEW APPLICATION ENTERED

May 05, 2025

Code NWAP

Other Marks by 3dB Labs, Inc.

Additional USPTO filings from the same owner.

KIR

KIRBY

98830733

3dB Labs, Inc.

REGISTERED

MON

MONARCH

98095966

3dB Labs, Inc.

REGISTERED

SCE

SCEPTRE

98102799

3dB Labs, Inc.

REGISTERED

3DB

3DB LABS

98105054

3dB Labs, Inc.

REGISTERED

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Other Marks by Matthew D. Delaney

Additional USPTO filings handled by the same attorney of record.

COM

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GOL

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DUR

DURULITE

74543739

REGISTERED

CITADEL

What to file next

Full Goods & Services

Filing Basis & Declarations

Other Marks by 3dB Labs, Inc.

Other Marks in Class 009 — Electronics, software & scientific instruments

Other Marks by Matthew D. Delaney

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