USPTO trademark

XILIO

RegisteredUSPTOWord markClass 5

"XILIO" is a word mark owned by Xilio Development, Inc., filed at the USPTO on January 16, 2026. It is registered and covers class 5 (Pharmaceuticals).

Get this data via the API

Data current as of August 4, 2026Official USPTO record

As filed with the USPTO

Status: Registered; Since August 4, 2026
Filed: January 16, 2026
Registered: August 4, 2026
Expires: Not recorded
Application no.: 99598873
Registration no.: 8377755
Office: USPTO; United States Patent and Trademark Office
Mark type: Word mark; 1 class

Ownership

Who owns XILIO

The owner and representative on file with the office.

Owner

Xilio Development, Inc.

Waltham, United States

Representative

Valerie Brennan

Plave Koch PLC

Goods and services

What the mark covers

The products and services XILIO is filed for, grouped by Nice class.

05Class 5 · Pharmaceuticals
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

History

What has happened so far

Steps recorded by the USPTO, newest first.

August 4, 2026Notice of registration confirmation emailed
August 4, 2026Registered-principal register
June 16, 2026Official gazette publication confirmation e-mailed
June 16, 2026Published for opposition
June 10, 2026Notification of notice of publication e-mailed
May 15, 2026Approved for pub - principal register
May 14, 2026Assigned to examiner
January 16, 2026Application filing receipt mailed
January 16, 2026New application office supplied data entered
January 16, 2026New application entered

FAQ

About XILIO

Who owns the trademark "XILIO"?

The USPTO trademark "XILIO" (application 99598873) is owned by Xilio Development, Inc.

What is the status of "XILIO"?

Its status at the USPTO is: registered.

When was "XILIO" registered?

It was registered on August 4, 2026.

API

Get this data via the API

Everything on this page comes from the Signa API. Pull XILIO and marks like it into your own product with one request.

GET/v1/trademarks/{id}
The full record: owners, classes, dates and images
GET/v1/trademarks/{id}/events
Every step in the office history
GET/v1/proceedings?trademark_id={id}
Oppositions and cancellations against the mark

Get API key View docs

GET /v1/trademarks/{id}

ID=tm_019d2b8c-94c7-757b-a508-3c221e6cf8bc
curl https://api.signa.so/v1/trademarks/$ID \
  -H "Authorization: Bearer $SIGNA_API_KEY"

Response

{
  "id": "tm_019d2b8c-94c7-757b-a508-3c221e6cf8bc",
  "object": "trademark",
  "mark_text": "XILIO",
  "status": {
    "primary": "active",
    "stage": "registered"
  },
  "office_code": "US",
  "application_number": "99598873",
  "filing_date": "2026-01-16",
  "nice_classes": [
    5
  ],
  "owners": [
    {
      "name": "XILIO DEVELOPMENT, INC.",
      "entity_id": null
    }
  ]
}