Who owns the ENDURX trademark?

The ENDURX trademark is owned by Exerkine Corporation.

What is the serial number for ENDURX?

The USPTO serial number for ENDURX is 90657712.

What is the registration number for ENDURX?

ENDURX is registered under USPTO registration number 7885816.

END

USPTO Trademark Record

REGISTERED

ENDURX

Q: What class is the ENDURX trademark registered in?

The ENDURX trademark is registered in Class 009 (Electronics, software & scientific instruments), Class 041 (Education & entertainment services).

SN 90657712·Reg 7885816·Filed Apr 20, 2021

Owner Exerkine Corporation

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.; Education; providing of training; entertainment; sporting and cultural activities.

ENDURX (Serial No. 90657712), Registration No. 7885816, is a registered US trademark filed on Apr 20, 2021 by Exerkine Corporation. This trademark covers Class 009 (Electronics, software & scientific instruments), Class 041 (Education & entertainment services).

early section 8: August 12, 2031

Mark Intelligence

ENDURX (Reg. #7885816) is a registered US trademark that has been protecting its owner, Exerkine Corporation, since 2021. The mark covers Class 009 (Electronics, software & scientific instruments) and Class 041 (Education & entertainment services) respectively. Goods and services include Scientific, research, navigation, surveying, photographic, cinematographic, audiovisual, optical, weighing, measuring, s.... The mark faced 2 opposition proceedings during prosecution.

FILED

Apr 20, 2021

SERIAL

90657712

REG#

7885816

REGISTERED

Aug 12, 2025

Owner

Applicant

Exerkine Corporation

Entity

Corporation

Address

MUMC 2H26, 1200 Main Street W., Hamilton, Ontario, L8N3Z5

Country

Attorney

NameJamie E. Sternberg

Law firm

Jamie E. Sternberg SignPost IP LLC

Docket

33.04.402

Address

430 New Park Avenue, Suite 102 - 1041, West Hartford, CT 06110, United States

Get pre-filing clearance

AI attorney analyzes your proposed mark against USPTO — Go/No-Go verdict, class-by-class risks, and strategy recommendations.

Run clearance

Filing Information

StatusREGISTERED

Filing DateApr 20, 2021

Serial Number90657712

Registration No.7885816

Registration DateAug 12, 2025

Status DateAug 12, 2025

Published for OppositionJun 24, 2025

Mark TypeStandard characters

Attorney Docket33.04.402

Status DescriptionLive and registered

Filing Signals

FILED

2021

YEARS AGO

CLASSES

MADRID FILINGS

—

Opposed 2× during prosecution

Search 14M+ trademarks

Free USPTO lookups by name, owner, or serial number. No account needed.

Search now

Full Goods & Services

CLASSES

OFFICE

USPTO

COUNTRY

Class 009Electronics, software & scientific instruments

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

Class 041Education & entertainment services

US codes: 100, 101, 107

Education; providing of training; entertainment; sporting and cultural activities.

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

Status History

56 events

TEAS CHANGE OF OWNER ADDRESS RECEIVED

Aug 30, 2025

TEAS CHANGE OF OWNER ADDRESS RECEIVED

APPLICANT/CORRESPONDENCE CHANGES (NON-RESPONSIVE) ENTERED

Aug 30, 2025

APPLICANT/CORRESPONDENCE CHANGES (NON-RESPONSIVE) ENTERED

TEAS REVOKE/APP/CHANGE ADDR OF ATTY/DOM REP RECEIVED

Aug 30, 2025

TEAS REVOKE/APP/CHANGE ADDR OF ATTY/DOM REP RECEIVED

ATTORNEY/DOM.REP.REVOKED AND/OR APPOINTED

Aug 30, 2025

ATTORNEY/DOM.REP.REVOKED AND/OR APPOINTED

TEAS WITHDRAWAL AS DOMESTIC REPRESENTATIVE RECEIVED

Aug 30, 2025

TEAS WITHDRAWAL AS DOMESTIC REPRESENTATIVE RECEIVED

TEAS CHANGE OF CORRESPONDENCE RECEIVED

Aug 30, 2025

TEAS CHANGE OF CORRESPONDENCE RECEIVED

REGISTERED-PRINCIPAL REGISTER

Aug 12, 2025

REGISTERED-PRINCIPAL REGISTER

NOTICE OF REGISTRATION CONFIRMATION EMAILED

Aug 12, 2025

NOTICE OF REGISTRATION CONFIRMATION EMAILED

PUBLISHED FOR OPPOSITION

Jun 24, 2025

PUBLISHED FOR OPPOSITION

OFFICIAL GAZETTE PUBLICATION CONFIRMATION E-MAILED

Jun 24, 2025

OFFICIAL GAZETTE PUBLICATION CONFIRMATION E-MAILED

NOTIFICATION OF NOTICE OF PUBLICATION E-MAILED

Jun 18, 2025

NOTIFICATION OF NOTICE OF PUBLICATION E-MAILED

PETITION TO DIRECTOR - CHANGE BASIS - GRANTED

Jun 05, 2025

PETITION TO DIRECTOR - CHANGE BASIS - GRANTED

NOTICE OF ALLOWANCE CANCELLED

Jun 05, 2025

NOTICE OF ALLOWANCE CANCELLED

CASE RETURNED TO EXAMINATION

Jun 05, 2025

CASE RETURNED TO EXAMINATION

ASSIGNED TO PETITION STAFF

Jun 02, 2025

ASSIGNED TO PETITION STAFF

TEAS PETITION TO AMEND BASIS RECEIVED

Apr 30, 2025

TEAS PETITION TO AMEND BASIS RECEIVED

SOU TEAS EXTENSION RECEIVED

Oct 30, 2024

SOU TEAS EXTENSION RECEIVED

SOU EXTENSION 5 FILED

Oct 30, 2024

SOU EXTENSION 5 FILED

SOU EXTENSION 5 GRANTED

Oct 30, 2024

SOU EXTENSION 5 GRANTED

NOTICE OF APPROVAL OF EXTENSION REQUEST E-MAILED

Oct 30, 2024

NOTICE OF APPROVAL OF EXTENSION REQUEST E-MAILED

Mar 20, 2024

NOTICE OF APPROVAL OF EXTENSION REQUEST E-MAILED

SOU TEAS EXTENSION RECEIVED

Mar 19, 2024

SOU TEAS EXTENSION RECEIVED

SOU EXTENSION 4 FILED

Mar 19, 2024

SOU EXTENSION 4 FILED

SOU EXTENSION 4 GRANTED

Mar 19, 2024

SOU EXTENSION 4 GRANTED

TEAS REVOKE/APP/CHANGE ADDR OF ATTY/DOM REP RECEIVED

Jan 08, 2024

TEAS REVOKE/APP/CHANGE ADDR OF ATTY/DOM REP RECEIVED

ATTORNEY/DOM.REP.REVOKED AND/OR APPOINTED

Jan 08, 2024

ATTORNEY/DOM.REP.REVOKED AND/OR APPOINTED

TEAS CHANGE OF DOMESTIC REPRESENTATIVES ADDRESS

Jan 08, 2024

TEAS CHANGE OF DOMESTIC REPRESENTATIVES ADDRESS

TEAS CHANGE OF CORRESPONDENCE RECEIVED

Jan 08, 2024

TEAS CHANGE OF CORRESPONDENCE RECEIVED

TEAS WITHDRAWAL OF ATTORNEY RECEIVED-FIRM RETAINS

Jan 08, 2024

TEAS WITHDRAWAL OF ATTORNEY RECEIVED-FIRM RETAINS

NOTICE OF APPROVAL OF EXTENSION REQUEST E-MAILED

Sep 13, 2023

NOTICE OF APPROVAL OF EXTENSION REQUEST E-MAILED

SOU TEAS EXTENSION RECEIVED

Sep 11, 2023

SOU TEAS EXTENSION RECEIVED

SOU EXTENSION 3 FILED

Sep 11, 2023

SOU EXTENSION 3 FILED

SOU EXTENSION 3 GRANTED

Sep 11, 2023

SOU EXTENSION 3 GRANTED

NOTICE OF APPROVAL OF EXTENSION REQUEST E-MAILED

Apr 27, 2023

NOTICE OF APPROVAL OF EXTENSION REQUEST E-MAILED

SOU TEAS EXTENSION RECEIVED

Apr 25, 2023

SOU TEAS EXTENSION RECEIVED

SOU EXTENSION 2 FILED

Apr 25, 2023

SOU EXTENSION 2 FILED

SOU EXTENSION 2 GRANTED

Apr 25, 2023

SOU EXTENSION 2 GRANTED

NOTICE OF APPROVAL OF EXTENSION REQUEST E-MAILED

Nov 03, 2022

NOTICE OF APPROVAL OF EXTENSION REQUEST E-MAILED

SOU TEAS EXTENSION RECEIVED

Nov 01, 2022

SOU TEAS EXTENSION RECEIVED

SOU EXTENSION 1 FILED

Nov 01, 2022

SOU EXTENSION 1 FILED

SOU EXTENSION 1 GRANTED

Nov 01, 2022

SOU EXTENSION 1 GRANTED

NOA E-MAILED - SOU REQUIRED FROM APPLICANT

May 03, 2022

NOA E-MAILED - SOU REQUIRED FROM APPLICANT

PUBLISHED FOR OPPOSITION

Mar 08, 2022

PUBLISHED FOR OPPOSITION

OFFICIAL GAZETTE PUBLICATION CONFIRMATION E-MAILED

Mar 08, 2022

OFFICIAL GAZETTE PUBLICATION CONFIRMATION E-MAILED

NOTIFICATION OF NOTICE OF PUBLICATION E-MAILED

Feb 16, 2022

NOTIFICATION OF NOTICE OF PUBLICATION E-MAILED

ASSIGNED TO LIE

Feb 02, 2022

ASSIGNED TO LIE

APPROVED FOR PUB - PRINCIPAL REGISTER

Jan 31, 2022

APPROVED FOR PUB - PRINCIPAL REGISTER

TEAS/EMAIL CORRESPONDENCE ENTERED

Jan 08, 2022

TEAS/EMAIL CORRESPONDENCE ENTERED

TEAS RESPONSE TO OFFICE ACTION RECEIVED

Jan 07, 2022

TEAS RESPONSE TO OFFICE ACTION RECEIVED

CORRESPONDENCE RECEIVED IN LAW OFFICE

Jan 07, 2022

CORRESPONDENCE RECEIVED IN LAW OFFICE

NON-FINAL ACTION WRITTEN

Dec 21, 2021

NON-FINAL ACTION WRITTEN

NON-FINAL ACTION E-MAILED

Dec 21, 2021

NON-FINAL ACTION E-MAILED

NOTIFICATION OF NON-FINAL ACTION E-MAILED

Dec 21, 2021

NOTIFICATION OF NON-FINAL ACTION E-MAILED

ASSIGNED TO EXAMINER

Dec 14, 2021

ASSIGNED TO EXAMINER

NEW APPLICATION OFFICE SUPPLIED DATA ENTERED

Jul 27, 2021

NEW APPLICATION OFFICE SUPPLIED DATA ENTERED

NEW APPLICATION ENTERED

Apr 23, 2021

NEW APPLICATION ENTERED

ENDURX

Get pre-filing clearance

Search 14M+ trademarks

Run a conflict check

Other Marks by Exerkine Corporation

Other Marks by Jamie E. Sternberg

Industries

USPTO Deadlines

Compare

Resources

Company