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Serial Number

88516686

Owner

X4 Pharmaceuticals, Inc.

Attorney

Karen K. Won

First Use Date

Jun 23, 2020

Filing Date

Jul 16, 2019

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X4 PHARMACEUTICALS Trademark

Serial Number: 88516686 • Registration: 6521317

X4 PHARMACEUTICALS is a trademark filed by X4 Pharmaceuticals, Inc. on July 16, 2019. The trademark is classified under Class 5 (Pharmaceuticals), Class 42 (Computer & Scientific). The application is currently registered and active.

Trademark Classes

Class 5 - Pharmaceuticals

Pharmaceutical and veterinary preparations; sanitary preparations for medical purposes

Class 42 - Computer & Scientific

Scientific and technological services; industrial analysis and research services

Owner Contact Info

X4 Pharmaceuticals, Inc. (17 trademarks)

Cambridge, MA 02139

Entity Type: 03

Legal Representation

Attorney of Record

Karen K. Won

306 trademarks filed View all →

Correspondence Address

Karen K. Won Mintz, Levin, Cohn, Ferris, Glovsky, and Popeo P.C.

One Financial Center

Boston, MA 02111

United States

Trademark Details

Filing Date

July 16, 2019

Registration Date

October 12, 2021

First Use Anywhere

June 23, 2020

First Use in Commerce

June 23, 2020

Published for Opposition

November 26, 2019

Goods & Services

Pharmaceutical preparations for the treatment of cancers, rare diseases, primary immune disorders and other diseases

Research and development in the pharmaceutical field; scientific research; scientific investigations for medical purposes

Filing History

TEAS CHANGE OF CORRESPONDENCE RECEIVED

Dec 9, 2025 TCCA

ATTORNEY/DOM.REP.REVOKED AND/OR APPOINTED

Dec 9, 2025 ARAA

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

Dec 9, 2025 REAP

APPLICANT/CORRESPONDENCE CHANGES (NON-RESPONSIVE) ENTERED

Dec 9, 2025 CHAN

TEAS CHANGE OF OWNER ADDRESS RECEIVED

Dec 9, 2025 COAR

TEAS WITHDRAWAL OF ATTORNEY RECEIVED-FIRM RETAINS

Oct 21, 2025 EWAF

TEAS CHANGE OF CORRESPONDENCE RECEIVED

Oct 21, 2025 TCCA

ATTORNEY/DOM.REP.REVOKED AND/OR APPOINTED

Oct 21, 2025 ARAA

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

Oct 21, 2025 REAP

REGISTERED-PRINCIPAL REGISTER

Oct 12, 2021 R.PR

NOTICE OF ACCEPTANCE OF STATEMENT OF USE E-MAILED

Sep 8, 2021 SUNA

ALLOWED PRINCIPAL REGISTER - SOU ACCEPTED

Sep 7, 2021 CNPR

NOTICE OF APPROVAL OF EXTENSION REQUEST E-MAILED

Aug 20, 2021 EXRA

STATEMENT OF USE PROCESSING COMPLETE

Aug 19, 2021 SUPC

SOU EXTENSION 4 GRANTED

Aug 19, 2021 EX4G

TEAS RESPONSE TO OFFICE ACTION RECEIVED

Aug 11, 2021 TROA

ITU OFFICE ACTION ISSUED FOR EXTENSION REQUEST

Aug 10, 2021 INCE

CASE ASSIGNED TO INTENT TO USE PARALEGAL

Aug 10, 2021 AITU

USE AMENDMENT FILED

Aug 4, 2021 IUAF

SOU EXTENSION 4 FILED

Aug 4, 2021 EXT4

SOU TEAS EXTENSION RECEIVED

Aug 4, 2021 EEXT

TEAS STATEMENT OF USE RECEIVED

Aug 4, 2021 EISU

NOTICE OF APPROVAL OF EXTENSION REQUEST E-MAILED

Jul 22, 2021 EXRA

SOU EXTENSION 3 GRANTED

Jul 20, 2021 EX3G

SOU EXTENSION 3 FILED

Jul 20, 2021 EXT3

SOU TEAS EXTENSION RECEIVED

Jul 20, 2021 EEXT

NOTICE OF APPROVAL OF EXTENSION REQUEST E-MAILED

Jan 23, 2021 EXRA

SOU EXTENSION 2 GRANTED

Jan 21, 2021 EX2G

SOU EXTENSION 2 FILED

Jan 21, 2021 EXT2

SOU TEAS EXTENSION RECEIVED

Jan 21, 2021 EEXT

NOTICE OF APPROVAL OF EXTENSION REQUEST E-MAILED

Jul 22, 2020 EXRA

SOU EXTENSION 1 GRANTED

Jul 20, 2020 EX1G

SOU EXTENSION 1 FILED

Jul 20, 2020 EXT1

SOU TEAS EXTENSION RECEIVED

Jul 20, 2020 EEXT

NOA E-MAILED - SOU REQUIRED FROM APPLICANT

Jan 21, 2020 NOAM

OFFICIAL GAZETTE PUBLICATION CONFIRMATION E-MAILED

Nov 26, 2019 NPUB

PUBLISHED FOR OPPOSITION

Nov 26, 2019 PUBO

NOTIFICATION OF NOTICE OF PUBLICATION E-MAILED

Nov 6, 2019 NONP

ASSIGNED TO LIE

Oct 23, 2019 ALIE

APPROVED FOR PUB - PRINCIPAL REGISTER

Oct 16, 2019 CNSA

TEAS/EMAIL CORRESPONDENCE ENTERED

Oct 11, 2019 TEME

CORRESPONDENCE RECEIVED IN LAW OFFICE

Oct 11, 2019 CRFA

TEAS RESPONSE TO OFFICE ACTION RECEIVED

Oct 11, 2019 TROA

TEAS RESPONSE TO OFFICE ACTION RECEIVED

Oct 11, 2019 TROA

NOTIFICATION OF NON-FINAL ACTION E-MAILED

Oct 10, 2019 GNRN

NON-FINAL ACTION E-MAILED

Oct 10, 2019 GNRT

NON-FINAL ACTION WRITTEN

Oct 10, 2019 CNRT

ASSIGNED TO EXAMINER

Oct 2, 2019 DOCK

NOTICE OF DESIGN SEARCH CODE E-MAILED

Jul 23, 2019 MDSM

NEW APPLICATION OFFICE SUPPLIED DATA ENTERED

Jul 22, 2019 NWOS

NEW APPLICATION ENTERED

Jul 19, 2019 NWAP

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