Who owns the THUNDERMAIL trademark?

The THUNDERMAIL trademark is owned by Mozilla Foundation.

What class is the THUNDERMAIL trademark registered in?

The THUNDERMAIL trademark is registered in Class 038 (Telecommunications services), Class 042 (Scientific, technology & SaaS services).

What is the serial number for THUNDERMAIL?

The USPTO serial number for THUNDERMAIL is 99540545.

What is the registration number for THUNDERMAIL?

THUNDERMAIL is registered under USPTO registration number 8454684.

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Updated Oct 7, 2026·20 searches this week

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USPTO Trademark Record

REGISTERED

THUNDERMAIL

SN 99540545·Reg 8454684·Filed Dec 10, 2025

Owner Mozilla Foundation

Telecommunications.; Scientific and technological services and research and design relating thereto; industrial analysis, industrial research and industrial design services; quality control and authentication services; design and development of computer hardware and software.

THUNDERMAIL (Serial No. 99540545), Registration No. 8454684, is a registered US trademark filed on Dec 10, 2025 by Mozilla Foundation. This trademark covers Class 038 (Telecommunications services), Class 042 (Scientific, technology & SaaS services).

early section 8: September 22, 2032

Mark Intelligence

THUNDERMAIL (Reg. #8454684) is a registered US trademark that has been protecting its owner, Mozilla Foundation, since 2025. The mark covers Class 038 (Telecommunications services) and Class 042 (Scientific, technology & SaaS services) respectively. Goods and services include Telecommunications.; Scientific and technological services and research and design relating thereto; industrial analysis.... The mark faced 1 opposition proceeding during prosecution.

FILED

Dec 10, 2025

SERIAL

99540545

REG#

8454684

REGISTERED

Sep 22, 2026

Filing Information

StatusREGISTERED

Filing DateDec 10, 2025

Serial Number99540545

Registration No.8454684

Registration DateSep 22, 2026

Status DateSep 22, 2026

Published for OppositionMay 19, 2026

Filing Basis & Declarations

Standard Characters ClaimedUse Application Currently

International Filings

Madrid Protocol1 filings

This mark has 1 Madrid Protocol filing on record with the USPTO.

1916614

480Mar 25, 2026

Source: USPTO Madrid International Filing Requests

Full Goods & Services

CLASSES

OFFICE

USPTO

COUNTRY

Class 038Telecommunications services

US codes: 100, 101, 104

First use anywhere: May 05, 2026

First use in commerce: May 05, 2026

Telecommunications.

Class 042Scientific, technology & SaaS services

US codes: 100, 101

First use anywhere: May 05, 2026

First use in commerce: May 05, 2026

Scientific and technological services and research and design relating thereto; industrial analysis, industrial research and industrial design services; quality control and authentication services; design and development of computer hardware and software.

This description is as filed with the USPTO and defines the scope of trademark protection.