Who owns the POSEIDON trademark?

The POSEIDON trademark is owned by City of Hope.

What class is the POSEIDON trademark registered in?

The POSEIDON trademark is registered in Class 042 (Scientific, technology & SaaS services).

What is the serial number for POSEIDON?

The USPTO serial number for POSEIDON is 98137182.

What is the registration number for POSEIDON?

POSEIDON is registered under USPTO registration number 8146033.

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Updated Sep 17, 2026·37 searches this week

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POS

USPTO Trademark Record

REGISTERED

POSEIDON

SN 98137182·Reg 8146033·Filed Aug 17, 2023

Owner City of Hope

Scientific and technological services and research and design relating thereto; industrial analysis, industrial research and industrial design services; quality control and authentication services; design and development of computer hardware and software.

POSEIDON (Serial No. 98137182), Registration No. 8146033, is a registered US trademark filed on Aug 17, 2023 by City of Hope. This trademark covers Class 042 (Scientific, technology & SaaS services).

early section 8: February 17, 2032

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Mark Intelligence

POSEIDON (Reg. #8146033) is a registered US trademark that has been protecting its owner, City of Hope, since 2023. The mark covers Class 042 (Scientific, technology & SaaS services). Goods and services include Scientific and technological services and research and design relating thereto; industrial analysis, industrial research.... The mark faced 1 opposition proceeding during prosecution.

FILED

Aug 17, 2023

SERIAL

98137182

REG#

8146033

REGISTERED

Feb 17, 2026

Filing Information

StatusREGISTERED

Filing DateAug 17, 2023

Serial Number98137182

Registration No.8146033

Registration DateFeb 17, 2026

Status DateFeb 17, 2026

Published for OppositionApr 02, 2024

Filing Basis & Declarations

Standard Characters ClaimedUse Application Currently

Full Goods & Services

CLASSES

OFFICE

USPTO

COUNTRY

Class 042Scientific, technology & SaaS services

US codes: 100, 101

First use anywhere: Feb 28, 2020

First use in commerce: Feb 28, 2020

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

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Status History

37 events

REGISTERED-PRINCIPAL REGISTER

Feb 17, 2026

REGISTERED-PRINCIPAL REGISTER

NOTICE OF REGISTRATION CONFIRMATION EMAILED

Feb 17, 2026

NOTICE OF REGISTRATION CONFIRMATION EMAILED

ALLOWED PRINCIPAL REGISTER - SOU ACCEPTED

Jan 28, 2026

ALLOWED PRINCIPAL REGISTER - SOU ACCEPTED

NOTICE OF ACCEPTANCE OF STATEMENT OF USE E-MAILED

Jan 28, 2026

NOTICE OF ACCEPTANCE OF STATEMENT OF USE E-MAILED

ASSIGNED TO LIE

Jan 27, 2026

ASSIGNED TO LIE

CORRESPONDENCE RECEIVED IN LAW OFFICE

Jan 27, 2026

CORRESPONDENCE RECEIVED IN LAW OFFICE

TEAS/EMAIL CORRESPONDENCE ENTERED

Jan 27, 2026

TEAS/EMAIL CORRESPONDENCE ENTERED

TEAS RESPONSE TO OFFICE ACTION RECEIVED

Jan 23, 2026

TEAS RESPONSE TO OFFICE ACTION RECEIVED

NOTIFICATION OF NON-FINAL ACTION E-MAILED

Nov 17, 2025

NOTIFICATION OF NON-FINAL ACTION E-MAILED

NON-FINAL ACTION E-MAILED

Nov 17, 2025

NON-FINAL ACTION E-MAILED

SU - NON-FINAL ACTION - WRITTEN

Nov 17, 2025

SU - NON-FINAL ACTION - WRITTEN

NOTICE OF APPROVAL OF EXTENSION REQUEST E-MAILED

Nov 15, 2025

NOTICE OF APPROVAL OF EXTENSION REQUEST E-MAILED

CASE ASSIGNED TO INTENT TO USE PARALEGAL

Nov 14, 2025

CASE ASSIGNED TO INTENT TO USE PARALEGAL

SOU EXTENSION 2 GRANTED

Nov 14, 2025

SOU EXTENSION 2 GRANTED

STATEMENT OF USE PROCESSING COMPLETE

Nov 14, 2025

STATEMENT OF USE PROCESSING COMPLETE

SOU TEAS EXTENSION RECEIVED

May 30, 2025

SOU TEAS EXTENSION RECEIVED

TEAS STATEMENT OF USE RECEIVED

May 30, 2025

TEAS STATEMENT OF USE RECEIVED

USE AMENDMENT FILED

May 30, 2025

USE AMENDMENT FILED

SOU EXTENSION 2 FILED

May 29, 2025

SOU EXTENSION 2 FILED

NOTICE OF APPROVAL OF EXTENSION REQUEST E-MAILED

Mar 03, 2025

NOTICE OF APPROVAL OF EXTENSION REQUEST E-MAILED

SOU EXTENSION 1 GRANTED

Dec 03, 2024

SOU EXTENSION 1 GRANTED

SOU TEAS EXTENSION RECEIVED

Dec 02, 2024

SOU TEAS EXTENSION RECEIVED

SOU EXTENSION 1 FILED

Dec 02, 2024

SOU EXTENSION 1 FILED

NOA E-MAILED - SOU REQUIRED FROM APPLICANT

Jun 04, 2024

NOA E-MAILED - SOU REQUIRED FROM APPLICANT

PUBLISHED FOR OPPOSITION

Apr 02, 2024

PUBLISHED FOR OPPOSITION

OFFICIAL GAZETTE PUBLICATION CONFIRMATION E-MAILED

Apr 02, 2024

OFFICIAL GAZETTE PUBLICATION CONFIRMATION E-MAILED

NOTIFICATION OF NOTICE OF PUBLICATION E-MAILED

Mar 13, 2024

NOTIFICATION OF NOTICE OF PUBLICATION E-MAILED

APPROVED FOR PUB - PRINCIPAL REGISTER

Feb 28, 2024

APPROVED FOR PUB - PRINCIPAL REGISTER

TEAS/EMAIL CORRESPONDENCE ENTERED

Feb 27, 2024

TEAS/EMAIL CORRESPONDENCE ENTERED

CORRESPONDENCE RECEIVED IN LAW OFFICE

Feb 27, 2024

CORRESPONDENCE RECEIVED IN LAW OFFICE

TEAS RESPONSE TO OFFICE ACTION RECEIVED

Feb 27, 2024

TEAS RESPONSE TO OFFICE ACTION RECEIVED

NON-FINAL ACTION WRITTEN

Feb 07, 2024

NON-FINAL ACTION WRITTEN

NON-FINAL ACTION E-MAILED

Feb 07, 2024

NON-FINAL ACTION E-MAILED

NOTIFICATION OF NON-FINAL ACTION E-MAILED

Feb 07, 2024

NOTIFICATION OF NON-FINAL ACTION E-MAILED

ASSIGNED TO EXAMINER

Jan 22, 2024

ASSIGNED TO EXAMINER

NEW APPLICATION OFFICE SUPPLIED DATA ENTERED

Sep 15, 2023

NEW APPLICATION OFFICE SUPPLIED DATA ENTERED

NEW APPLICATION ENTERED

Aug 21, 2023

NEW APPLICATION ENTERED

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CIT

CITY OF HOPE

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City of Hope

REGISTERED

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