Opposition · USPTO

Opposition 91303185

OtherUSPTO

Opposition 91303185 at USPTO between Hangzhou DeepSeek Artificial Intelligence Co., Ltd. and Ying Fang, over the mark DEPEEK, filed Nov 18, 2025. Status in the office record: other.

View DEPEEKGet this data via the API
Status
Other
Result
Other
Filed
Nov 18, 2025
Marks involved
5
Parties

Who is involved

The parties as named in the office record.

Opponent

Hangzhou DeepSeek Artificial Intelligence Co., Ltd.

Company trademarks
Respondent

Ying Fang

Timeline

How the case has moved

Dates from the USPTO record and the DEPEEK filing.

  1. DEPEEK filed

    Application 99170601 filed at the USPTO.

  2. Opposition filed

    Hangzhou DeepSeek Artificial Intelligence Co., Ltd. started opposition 91303185 at USPTO against DEPEEK.
Marks

Marks involved

1 contested mark, 4 marks the challenger relies on.

MarkRoleApplicationOffice
DEPEEKContested99170601USPTO
DEEPSEEKRelied on99019883USPTO
DEEPSEEKRelied on99021618USPTO
DEEPSEEKRelied on99021619USPTO
DEEPSEEKRelied on99025382USPTO
API

Get this data via the API

Every fact on this page comes from the Signa API. Track oppositions and cancellations on any mark with one request.

  • GET/v1/proceedings/{id}

    Parties, dates, outcome and every mark in the case

  • GET/v1/proceedings?trademark_id={trademark_id}

    Every proceeding on a mark

Get API keyView docs
GET /v1/proceedings/{id}
ID=prc_09971675-b9ee-4f0c-b065-601e1367dd41
curl https://api.signa.so/v1/proceedings/$ID \
  -H "Authorization: Bearer $SIGNA_API_KEY"
Response
{
  "id": "prc_09971675-b9ee-4f0c-b065-601e1367dd41",
  "object": "proceeding",
  "proceeding_type": "opposition",
  "proceeding_number": "91303185",
  "status": "other",
  "office_code": "US",
  "filed_date": "2025-11-18",
  "parties": [
    {
      "name": "Hangzhou DeepSeek Artificial Intelligence Co., Ltd.",
      "role": "opponent"
    },
    {
      "name": "Ying Fang",
      "role": "respondent"
    }
  ]
}