USPTO trademark

SOSEIN

Opposition periodUSPTOWord markClass 9Class 42

"SOSEIN" is a word mark owned by Sosein LLC, filed at the USPTO on May 6, 2026. It is in its opposition period and covers classes 9 and 42.

Get this data via the API
Official USPTO record
SOSEIN trademark as filed
As filed with the USPTO
Status
Opposition period
Since October 6, 2026
Filed
May 6, 2026
Registered
Not yet
Expires
Not recorded
Application no.
99807940
Registration no.
Not yet
Office
USPTO
United States Patent and Trademark Office
Mark type
Word mark
2 classes
Ownership

Who owns SOSEIN

The owner and representative on file with the office.

Owner

Sosein LLC

Wilmington, United States

Representative

Chelseaa Larsen

Sheppard Mullin Richter & Hampton, LLP

Goods and services

What the mark covers

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

  • Downloadable computer software applications based on artificial intelligence featuring software development tools, tools for generating and testing software code, and tools for generating software specifications; downloadable agentic software for use in computer software development, code generation and testing, and the generation of software specifications

  • Software as a service (SaaS) based on artificial intelligence featuring software development tools, tools for generating and testing software code, and tools for generating software specifications; Platform as a service (PaaS) based on artificial intelligence featuring software development tools, tools for generating and testing software code, and tools for generating software specifications; Artificial intelligence as a service (AIAAS) services based on artificial intelligence featuring software development tools, tools for generating and testing software code, and tools for generating software specifications; providing online non-downloadable agentic software for use in software development, code generation and testing, and the generation of software specifications

History

What has happened so far

Steps recorded by the USPTO, newest first.

  1. Official gazette publication confirmation e-mailed
  2. Published for opposition
  3. Notification of notice of publication e-mailed
  4. Approved for pub - principal register
  5. Notification of examiners amendment e-mailed
  6. Examiner's amendment entered
  7. Examiners amendment e-mailed
  8. Examiners amendment -written
  9. Assigned to examiner
  10. New application office supplied data entered

2 earlier steps on the official record.

FAQ

About SOSEIN

Who owns the trademark "SOSEIN"?

The USPTO trademark "SOSEIN" (application 99807940) is owned by Sosein LLC.

What is the status of "SOSEIN"?

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 SOSEIN 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_019e28e5-0f38-70d8-a74b-f155a06d31a2
curl https://api.signa.so/v1/trademarks/$ID \
  -H "Authorization: Bearer $SIGNA_API_KEY"
Response
{
  "id": "tm_019e28e5-0f38-70d8-a74b-f155a06d31a2",
  "object": "trademark",
  "mark_text": "SOSEIN",
  "status": {
    "primary": "pending",
    "stage": "pending_opposition"
  },
  "office_code": "US",
  "application_number": "99807940",
  "filing_date": "2026-05-06",
  "nice_classes": [
    9,
    42
  ],
  "owners": [
    {
      "name": "Sosein LLC",
      "entity_id": null
    }
  ]
}