USPTO trademark

SPERO

Under examinationUSPTOWord and designClass 5Class 42

"SPERO" is a word and design mark owned by Spero Therapeutics, Inc., filed at the USPTO on September 24, 2026. It is under examination and covers classes 5 and 42.

Get this data via the API
Official USPTO record
SPERO trademark as filed
As filed with the USPTO
Status
Under examination
Since September 24, 2026
Filed
September 24, 2026
Registered
Not yet
Expires
Not recorded
Application no.
50127853
Registration no.
Not yet
Office
USPTO
United States Patent and Trademark Office
Mark type
Word and design
2 classes
Ownership

Who owns SPERO

The owner and representative on file with the office.

Owner

Spero Therapeutics, Inc.

Cambridge, United States

Representative

Jonathan M. Gelchinsky

Pierce Atwood LLP

Goods and services

What the mark covers

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

  • Pharmaceutical preparations for the treatment of immunological diseases and disorders; Pharmaceutical preparations for the treatment of inflammatory diseases and disorders; Pharmaceutical preparations for the treatment of rheumatological diseases and disorders; Pharmaceutical preparations for the treatment of immune-mediated diseases and disorders

  • Pharmaceutical research services; Pharmaceutical drug development services

History

What has happened so far

Steps recorded by the USPTO, newest first.

  1. Application filing receipt mailed
  2. New application entered
FAQ

About SPERO

Who owns the trademark "SPERO"?

The USPTO trademark "SPERO" (application 50127853) is owned by Spero Therapeutics, Inc.

What is the status of "SPERO"?

Its status at the USPTO is: under examination.

API

Get this data via the API

Everything on this page comes from the Signa API. Pull SPERO 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 keyView docs
GET /v1/trademarks/{id}
ID=tm_01a0d8b6-3648-732d-b4e8-97f9b21e10b6
curl https://api.signa.so/v1/trademarks/$ID \
  -H "Authorization: Bearer $SIGNA_API_KEY"
Response
{
  "id": "tm_01a0d8b6-3648-732d-b4e8-97f9b21e10b6",
  "object": "trademark",
  "mark_text": "SPERO",
  "status": {
    "primary": "pending",
    "stage": "examining"
  },
  "office_code": "US",
  "application_number": "50127853",
  "filing_date": "2026-09-24",
  "nice_classes": [
    5,
    42
  ],
  "owners": [
    {
      "name": "Spero Therapeutics, Inc.",
      "entity_id": null
    }
  ]
}