TCCA
TEAS CHANGE OF CORRESPONDENCE RECEIVED
12/09/2025
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Official data from USPTO
X4 PHARMACEUTICALS
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Active USPTO registrationType: CombinedOffice: United States
Risk and opportunity diagnosis
Executive reading for naming, filing, and monitoring decisions.
USPTO status
Active USPTO registration
Case type
Application and registration
Recorded events
50
Latest update
12/11/2025
Trademark type
Combined
Nice classes
5, 42
Filing date
07/16/2019
Registration date
10/12/2021
Expiration date
-
Complete case details
Structured fields from the responsible authority and the official record.
Status date
10/12/2021
Last transaction
12/11/2025
Responsible office
United States Patent and Trademark Office
Status code
700
Official register
Principal Register
Filing basis
Intent to use
First use anywhere
06/23/2020
First use in commerce
06/23/2020
Drawing code
3
Owner type
03
Owner location
Cambridge, MA
Examiner
PENDLETON,CAROLYN A
Law office
L30
Current location
PUBLICATION AND ISSUE SECTION
Mark description
The mark consists of the letter "X" to the left of the numeral "4" and directly above the word "PHARMACEUTICALS", with a solid sphere above the vertical bar in the numeral "4".
Holders and representatives
Holders
X4 Pharmaceuticals, Inc.
Representatives
Karen K. Won Mintz, Levin, Cohn, Ferris, Glovsky, and Popeo P.C.
Technical classification
Nice Classes
Class 5Class 42
Vienna Codes
No Vienna codes available.
Goods and services
Class 5
Pharmaceutical preparations for the treatment of cancersrare diseasesprimary immune disorders and other diseases
Class 42
Research and development in the pharmaceutical field; scientific research; scientific investigations for medical purposes
Publications
History of USPTO decisions and trademark events.
50 publications found
ARAA
ATTORNEY/DOM.REP.REVOKED AND/OR APPOINTED
12/09/2025
REAP
TEAS REVOKE/APP/CHANGE ADDR OF ATTY/DOM REP RECEIVED
12/09/2025
CHAN
APPLICANT/CORRESPONDENCE CHANGES (NON-RESPONSIVE) ENTERED
12/09/2025
COAR
TEAS CHANGE OF OWNER ADDRESS RECEIVED
12/09/2025
EWAF
TEAS WITHDRAWAL OF ATTORNEY RECEIVED-FIRM RETAINS
10/21/2025
TCCA
TEAS CHANGE OF CORRESPONDENCE RECEIVED
10/21/2025
ARAA
ATTORNEY/DOM.REP.REVOKED AND/OR APPOINTED
10/21/2025
REAP
TEAS REVOKE/APP/CHANGE ADDR OF ATTY/DOM REP RECEIVED
10/21/2025
R.PR
REGISTERED-PRINCIPAL REGISTER
10/12/2021
SUNA
NOTICE OF ACCEPTANCE OF STATEMENT OF USE E-MAILED
09/08/2021
CNPR
ALLOWED PRINCIPAL REGISTER - SOU ACCEPTED
09/07/2021
EXRA
NOTICE OF APPROVAL OF EXTENSION REQUEST E-MAILED
08/20/2021
SUPC
STATEMENT OF USE PROCESSING COMPLETE
08/19/2021
EX4G
SOU EXTENSION 4 GRANTED
08/19/2021
TROA
TEAS RESPONSE TO OFFICE ACTION RECEIVED
08/11/2021
INCE
ITU OFFICE ACTION ISSUED FOR EXTENSION REQUEST
08/10/2021
AITU
CASE ASSIGNED TO INTENT TO USE PARALEGAL
08/10/2021
IUAF
USE AMENDMENT FILED
08/04/2021
EXT4
SOU EXTENSION 4 FILED
08/04/2021
EEXT
SOU TEAS EXTENSION RECEIVED
08/04/2021
EISU
TEAS STATEMENT OF USE RECEIVED
08/04/2021
EXRA
NOTICE OF APPROVAL OF EXTENSION REQUEST E-MAILED
07/22/2021
EX3G
SOU EXTENSION 3 GRANTED
07/20/2021
EXT3
SOU EXTENSION 3 FILED
07/20/2021
EEXT
SOU TEAS EXTENSION RECEIVED
07/20/2021
EXRA
NOTICE OF APPROVAL OF EXTENSION REQUEST E-MAILED
01/23/2021
EX2G
SOU EXTENSION 2 GRANTED
01/21/2021
EXT2
SOU EXTENSION 2 FILED
01/21/2021
EEXT
SOU TEAS EXTENSION RECEIVED
01/21/2021
EXRA
NOTICE OF APPROVAL OF EXTENSION REQUEST E-MAILED
07/22/2020
EX1G
SOU EXTENSION 1 GRANTED
07/20/2020
EXT1
SOU EXTENSION 1 FILED
07/20/2020
EEXT
SOU TEAS EXTENSION RECEIVED
07/20/2020
NOAM
NOA E-MAILED - SOU REQUIRED FROM APPLICANT
01/21/2020
NPUB
OFFICIAL GAZETTE PUBLICATION CONFIRMATION E-MAILED
11/26/2019
PUBO
PUBLISHED FOR OPPOSITION
11/26/2019
NONP
NOTIFICATION OF NOTICE OF PUBLICATION E-MAILED
11/06/2019
ALIE
ASSIGNED TO LIE
10/23/2019
CNSA
APPROVED FOR PUB - PRINCIPAL REGISTER
10/16/2019
TEME
TEAS/EMAIL CORRESPONDENCE ENTERED
10/11/2019
CRFA
CORRESPONDENCE RECEIVED IN LAW OFFICE
10/11/2019
TROA
TEAS RESPONSE TO OFFICE ACTION RECEIVED
10/11/2019
GNRN
NOTIFICATION OF NON-FINAL ACTION E-MAILED
10/10/2019
GNRT
NON-FINAL ACTION E-MAILED
10/10/2019
CNRT
NON-FINAL ACTION WRITTEN
10/10/2019
DOCK
ASSIGNED TO EXAMINER
10/02/2019
MDSM
NOTICE OF DESIGN SEARCH CODE E-MAILED
07/23/2019
NWOS
NEW APPLICATION OFFICE SUPPLIED DATA ENTERED
07/22/2019
NWAP
NEW APPLICATION ENTERED
07/19/2019
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