XILIO THERAPEUTICS Trademark
Trademark Overview
On Friday, January 16, 2026, a trademark application was filed for XILIO THERAPEUTICS with the United States Patent and Trademark Office. The USPTO has given the XILIO THERAPEUTICS trademark a serial number of 99598865. The federal status of this trademark filing is PUBLISHED FOR OPPOSITION as of Tuesday, June 16, 2026. This trademark is owned by XILIO DEVELOPMENT, INC.. The XILIO THERAPEUTICS trademark is filed in the Pharmaceutical Products category with the following description:
Pharmaceutical products for the treatment of cancer, all of the foregoing excluding pharmaceutical products for sleep disorders, central nervous disorders other than cancers of the central nervous system, and neurological disorders other than cancers of the neurological system
General Information
| Serial Number | 99598865 |
| Word Mark | XILIO THERAPEUTICS |
| Filing Date | Friday, January 16, 2026 |
| Status | 686 - PUBLISHED FOR OPPOSITION |
| Status Date | Tuesday, June 16, 2026 |
| Registration Number | 0000000 |
| Registration Date | NOT AVAILABLE |
| Mark Drawing | 4 - Illustration: Drawing with word(s) / letter(s) / number(s) in Block form |
| Published for Opposition Date | Tuesday, June 16, 2026 |
Trademark Statements
| NOT AVAILABLE | "THERAPEUTICS" |
| Goods and Services | Pharmaceutical products for the treatment of cancer, all of the foregoing excluding pharmaceutical products for sleep disorders, central nervous disorders other than cancers of the central nervous system, and neurological disorders other than cancers of the neurological system |
Classification Information
| International Class | 005 - Pharmaceutical and veterinary preparations; sanitary preparations for medical purposes; dietetic substances adapted for medical use, food for babies; plasters, materials for dressings; material for stopping teeth, dental wax; disinfectants; preparations for destroying vermin; fungicides, herbicides. |
| US Class Codes | 005, 006, 018, 044, 046, 051, 052 |
| Class Status Code | 6 - Active |
| Class Status Date | Friday, January 16, 2026 |
| Primary Code | 005 |
| First Use Anywhere Date | Tuesday, March 2, 2021 |
| First Use In Commerce Date | Tuesday, March 2, 2021 |
Trademark Owner History
| Party Name | XILIO DEVELOPMENT, INC. |
| Party Type | 20 - Owner at Publication |
| Legal Entity Type | 03 - Corporation |
| Address | Waltham, MA 02451
US |
| Party Name | XILIO DEVELOPMENT, INC. |
| Party Type | 10 - Original Applicant |
| Legal Entity Type | 03 - Corporation |
| Address | Waltham, MA 02451
US |
Trademark Events
| Event Date | Event Description |
| Friday, January 16, 2026 | NEW APPLICATION ENTERED |
| Friday, January 16, 2026 | NEW APPLICATION OFFICE SUPPLIED DATA ENTERED |
| Friday, January 16, 2026 | APPLICATION FILING RECEIPT MAILED |
| Thursday, May 14, 2026 | ASSIGNED TO EXAMINER |
| Monday, May 18, 2026 | EXAMINERS AMENDMENT -WRITTEN |
| Monday, May 18, 2026 | EXAMINERS AMENDMENT E-MAILED |
| Monday, May 18, 2026 | EXAMINER'S AMENDMENT ENTERED |
| Monday, May 18, 2026 | APPROVED FOR PUB - PRINCIPAL REGISTER |
| Monday, May 18, 2026 | NOTIFICATION OF EXAMINERS AMENDMENT E-MAILED |
| Wednesday, June 10, 2026 | NOTIFICATION OF NOTICE OF PUBLICATION E-MAILED |
| Tuesday, June 16, 2026 | PUBLISHED FOR OPPOSITION |
| Tuesday, June 16, 2026 | OFFICIAL GAZETTE PUBLICATION CONFIRMATION E-MAILED |
