| Serial Number | 90847921 |
| Word Mark | X4 PHARMACEUTICALS |
| Filing Date | Monday, July 26, 2021 |
| Status | 700 - REGISTERED |
| Status Date | Tuesday, September 13, 2022 |
| Registration Number | 6843125 |
| Registration Date | Tuesday, September 13, 2022 |
| Mark Drawing | 3 - Illustration: Drawing or design which also includes word(s) / letter(s) / number(s) |
| Published for Opposition Date | Tuesday, June 28, 2022 |
| Description of Mark | 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. |
| Goods and Services | providing information in the field of the treatment of cancers, rare diseases, primary immune disorders and other diseases; genetic testing for medical purposes; genetic testing for scientific research purposes |
| Pseudo Mark | X FOUR PHARMACEUTICALS |
| NOT AVAILABLE | "PHARMACEUTICALS" |
| International Class | 044 - Medical services; veterinary services; hygienic and beauty care for human beings or animals; agriculture, horticulture and forestry services. |
| US Class Codes | 100, 101 |
| Class Status Code | 6 - Active |
| Class Status Date | Friday, September 24, 2021 |
| Primary Code | 044 |
| First Use Anywhere Date | Monday, November 30, 2015 |
| First Use In Commerce Date | Monday, November 30, 2015 |
| Party Name | X4 Pharmaceuticals, Inc. |
| Party Type | 30 - Original Registrant |
| Legal Entity Type | 03 - Corporation |
| Address | Cambridge, MA 02139 |
| Party Name | X4 Pharmaceuticals, Inc. |
| Party Type | 20 - Owner at Publication |
| Legal Entity Type | 03 - Corporation |
| Address | Cambridge, MA 02139 |
| Party Name | X4 Pharmaceuticals, Inc. |
| Party Type | 10 - Original Applicant |
| Legal Entity Type | 03 - Corporation |
| Address | Cambridge, MA 02139 |
| Event Date | Event Description |
| Thursday, July 29, 2021 | NEW APPLICATION ENTERED |
| Friday, September 24, 2021 | NEW APPLICATION OFFICE SUPPLIED DATA ENTERED |
| Saturday, September 25, 2021 | NOTICE OF DESIGN SEARCH CODE E-MAILED |
| Wednesday, April 20, 2022 | ASSIGNED TO EXAMINER |
| Friday, April 29, 2022 | NON-FINAL ACTION WRITTEN |
| Friday, April 29, 2022 | NON-FINAL ACTION E-MAILED |
| Friday, April 29, 2022 | NOTIFICATION OF NON-FINAL ACTION E-MAILED |
| Wednesday, May 18, 2022 | TEAS RESPONSE TO OFFICE ACTION RECEIVED |
| Wednesday, May 18, 2022 | CORRESPONDENCE RECEIVED IN LAW OFFICE |
| Wednesday, May 18, 2022 | TEAS/EMAIL CORRESPONDENCE ENTERED |
| Wednesday, May 18, 2022 | APPROVED FOR PUB - PRINCIPAL REGISTER |
| Friday, May 20, 2022 | ASSIGNED TO LIE |
| Wednesday, June 8, 2022 | NOTIFICATION OF NOTICE OF PUBLICATION E-MAILED |
| Tuesday, June 28, 2022 | PUBLISHED FOR OPPOSITION |
| Tuesday, June 28, 2022 | OFFICIAL GAZETTE PUBLICATION CONFIRMATION E-MAILED |
| Tuesday, September 13, 2022 | REGISTERED-PRINCIPAL REGISTER |
| Tuesday, September 13, 2022 | NOTICE OF REGISTRATION CONFIRMATION EMAILED |
| Tuesday, October 21, 2025 | TEAS REVOKE/APP/CHANGE ADDR OF ATTY/DOM REP RECEIVED |
| Tuesday, October 21, 2025 | ATTORNEY/DOM.REP.REVOKED AND/OR APPOINTED |
| Tuesday, October 21, 2025 | TEAS CHANGE OF CORRESPONDENCE RECEIVED |
| Tuesday, October 21, 2025 | TEAS WITHDRAWAL OF ATTORNEY RECEIVED-FIRM RETAINS |
| Tuesday, December 9, 2025 | TEAS CHANGE OF OWNER ADDRESS RECEIVED |
| Tuesday, December 9, 2025 | APPLICANT/CORRESPONDENCE CHANGES (NON-RESPONSIVE) ENTERED |
| Tuesday, December 9, 2025 | TEAS REVOKE/APP/CHANGE ADDR OF ATTY/DOM REP RECEIVED |
| Tuesday, December 9, 2025 | ATTORNEY/DOM.REP.REVOKED AND/OR APPOINTED |
| Tuesday, December 9, 2025 | TEAS CHANGE OF CORRESPONDENCE RECEIVED |