USPTO trademark

LIMESTONE

Under examinationUSPTOWord markClass 42

"LIMESTONE" is a word mark owned by Limestone AI Inc., filed at the USPTO on May 28, 2026. It is under examination and covers class 42 (Computer and Scientific Services).

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Official USPTO record
LIMESTONE trademark as filed
As filed with the USPTO
Status
Under examination
Since September 23, 2026
Filed
May 28, 2026
Registered
Not yet
Expires
Not recorded
Application no.
99851842
Registration no.
Not yet
Office
USPTO
United States Patent and Trademark Office
Mark type
Word mark
1 class
Ownership

Who owns LIMESTONE

The owner and representative on file with the office.

Owner

Limestone AI Inc.

Hockessin, United States

Representative

Daniel E. Sineway

Bradley Arant Boult Cummings LLP

Goods and services

What the mark covers

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

  • Cloud storage services for electronic data; cloud storage services for artificial intelligence (AI) workloads; cloud storage services, namely, object storage for artificial intelligence (AI) workloads; software as a service (SaaS) services featuring software for cloud-based storage; software as a service (SaaS) services featuring software for object storage; software as a service (SaaS) services featuring software for object storage for artificial intelligence (AI) workloads; software as a service (SaaS) services featuring software for data infrastructure and storage; software as a service (SaaS) service featuring software for data infrastructure for artificial intelligence (AI) workloads; software as a service (SaaS) services featuring software for computer infrastructure; software as a service (SaaS) services featuring software for artificial intelligence (AI) infrastructure

History

What has happened so far

Steps recorded by the USPTO, newest first.

  1. Notification of non-final action e-mailed
  2. Non-final action e-mailed
  3. Non-final action written
  4. Assigned to examiner
  5. Automatic update of assignment of ownership
  6. Application filing receipt mailed
  7. New application office supplied data entered
  8. New application entered
FAQ

About LIMESTONE

Who owns the trademark "LIMESTONE"?

The USPTO trademark "LIMESTONE" (application 99851842) is owned by Limestone AI Inc.

What is the status of "LIMESTONE"?

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 LIMESTONE 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_019e774c-fdbb-77bd-8047-d4b65a0b3bcd
curl https://api.signa.so/v1/trademarks/$ID \
  -H "Authorization: Bearer $SIGNA_API_KEY"
Response
{
  "id": "tm_019e774c-fdbb-77bd-8047-d4b65a0b3bcd",
  "object": "trademark",
  "mark_text": "LIMESTONE",
  "status": {
    "primary": "pending",
    "stage": "examining"
  },
  "office_code": "US",
  "application_number": "99851842",
  "filing_date": "2026-05-28",
  "nice_classes": [
    42
  ],
  "owners": [
    {
      "name": "LIMESTONE AI INC.",
      "entity_id": null
    }
  ]
}