Opposition · USPTO

Opposition 91304408

OtherUSPTO

Opposition 91304408 at USPTO between Mattel, Inc. and Blachorsky, Yitzchak Zev, over the mark WHAC-A-MOLD, filed Jan 13, 2026. Status in the office record: other.

View WHAC-A-MOLDGet this data via the API
Status
Other
Result
Other
Filed
Jan 13, 2026
Marks involved
4
Parties

Who is involved

The parties as named in the office record.

Opponent

Mattel, Inc.

Company trademarks
Respondent

Blachorsky, Yitzchak Zev

Timeline

How the case has moved

Dates from the USPTO record and the WHAC-A-MOLD filing.

  1. WHAC-A-MOLD filed

    Application 98711053 filed at the USPTO.

  2. Opposition filed

    Mattel, Inc. started opposition 91304408 at USPTO against WHAC-A-MOLD.
Marks

Marks involved

1 contested mark, 3 marks the challenger relies on.

MarkRoleApplicationOffice
WHAC-A-MOLDContested98711053USPTO
WHAC-A-MOLERelied on74097672USPTO
WHAC-A-MOLERelied on78038470USPTO
WHAC-A-MOLERelied on88760574USPTO
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_9cd760ff-fd63-45ad-8468-992d095592fb
curl https://api.signa.so/v1/proceedings/$ID \
  -H "Authorization: Bearer $SIGNA_API_KEY"
Response
{
  "id": "prc_9cd760ff-fd63-45ad-8468-992d095592fb",
  "object": "proceeding",
  "proceeding_type": "opposition",
  "proceeding_number": "91304408",
  "status": "other",
  "office_code": "US",
  "filed_date": "2026-01-13",
  "parties": [
    {
      "name": "MATTEL, INC.",
      "role": "opponent"
    },
    {
      "name": "Blachorsky, Yitzchak Zev",
      "role": "respondent"
    }
  ]
}