USPTO trademark

STC

Opposition periodUSPTOWord markClass 42

"STC" is a word mark owned by Siterwell Electronics Co., Limited, filed at the USPTO on December 17, 2025. It is in its opposition period and covers class 42 (Computer and Scientific Services).

View Siterwell Electronics Co., Limited portfolioGet this data via the API
Official USPTO record
STC trademark as filed
As filed with the USPTO
Status
Opposition period
Since July 14, 2026
Filed
December 17, 2025
Registered
Not yet
Expires
Not recorded
Application no.
99552601
Registration no.
Not yet
Office
USPTO
United States Patent and Trademark Office
Mark type
Word mark
1 class
Ownership

Who owns STC

The owner on file, matched to the company behind it. Every owner-name spelling for that company is grouped on its page.

Owner

Siterwell Electronics Co., Limited

Ningbo, Zhejiang, China

33 trademarks in the portfolioView company

Representative

Priscilla Lauren Speer

Bayramoglu Law Offices LLC

Goods and services

What the mark covers

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

  • Design of computer chips; Technological research in the field of remote sensing; Research in the field of artificial intelligence technology; Product quality testing; Research and development of new products for others; Scientific research; Development of software for chip design; Computer software design; Updating of computer software; Development of computer platforms

History

What has happened so far

Steps recorded by the USPTO, newest first.

  1. Extension of time to oppose process - terminated
  2. Opposition instituted no. 999999
  3. Extension of time to oppose received
  4. Official gazette publication confirmation e-mailed
  5. Published for opposition
  6. Notification of notice of publication e-mailed
  7. Approved for pub - principal register
  8. Assigned to examiner
  9. New application office supplied data entered
  10. Application filing receipt mailed

1 earlier step on the official record.

Disputes

Oppositions and cancellations

Proceedings recorded against this mark by the USPTO. Reported as recorded, not legal advice.

FAQ

About STC

Who owns the trademark "STC"?

The USPTO trademark "STC" (application 99552601) is owned by Siterwell Electronics Co., Limited.

What is the status of "STC"?

Its status at the USPTO is: opposition period.

API

Get this data via the API

Everything on this page comes from the Signa API. Pull STC 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_019d2b77-3c4b-7353-b090-a9ba2af8be1a
curl https://api.signa.so/v1/trademarks/$ID \
  -H "Authorization: Bearer $SIGNA_API_KEY"
Response
{
  "id": "tm_019d2b77-3c4b-7353-b090-a9ba2af8be1a",
  "object": "trademark",
  "mark_text": "STC",
  "status": {
    "primary": "pending",
    "stage": "pending_opposition"
  },
  "office_code": "US",
  "application_number": "99552601",
  "filing_date": "2025-12-17",
  "nice_classes": [
    42
  ],
  "owners": [
    {
      "name": "SITERWELL ELECTRONICS CO., LIMITED",
      "entity_id": "ent_019ee96d-3552-743d-b747-b1daa637e03a"
    }
  ]
}