Who owns the MAINENG trademark?

The MAINENG trademark is owned by Shenzhen Ruiou Optical System Ltd.

What class is the MAINENG trademark registered in?

The MAINENG trademark is registered in Class 011 (Lighting, heating, cooling & sanitary apparatus).

What is the serial number for MAINENG?

The USPTO serial number for MAINENG is 90129920.

What is the registration number for MAINENG?

MAINENG is registered under USPTO registration number 6320526.

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Updated Nov 5, 2026·33 searches this week

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Section 8 declaration window

April 13, 2027

159 days remaining

MAI

MAINENG

REGISTERED

Serial: 90129920
Reg: 6320526
Filed: Aug 21, 2020
Owner: Shenzhen Ruiou Optical System Ltd

Apparatus and installations for lighting, heating, cooling, steam generating, cooking, drying, ventilating, water supply and sanitary purposes.

What to file next

Section 8 declaration of continued use

When: Due between the fifth and sixth anniversary of registration.
Extensions and grace: A six-month grace period follows, with an added per-class fee.
If it is missed: A missed Section 8 cancels the registration, and there is no revival route for it.

How the Section 8 deadline works

General information about USPTO practice, not legal advice. The register is the authority, and a filing that has not yet posted can change what is owed.

Full Goods & Services

Class 011Lighting, heating, cooling & sanitary apparatus

US codes: 013, 021, 023, 031, 034

First use anywhere: Jul 07, 2020

First use in commerce: Jul 07, 2020

Apparatus and installations for lighting, heating, cooling, steam generating, cooking, drying, ventilating, water supply and sanitary purposes.

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

Status History

12 events

COURTESY REMINDER - SEC. 8 (6-YR) E-MAILED

Apr 13, 2026

Code REM1

TEAS REVOKE/APP/CHANGE ADDR OF ATTY/DOM REP RECEIVED

Apr 30, 2021

Code REAP

ATTORNEY/DOM.REP.REVOKED AND/OR APPOINTED

Apr 30, 2021

Code ARAA

TEAS CHANGE OF CORRESPONDENCE RECEIVED

Apr 30, 2021

Code TCCA

REGISTERED-PRINCIPAL REGISTER

Apr 13, 2021

Code R.PR

PUBLISHED FOR OPPOSITION

Jan 26, 2021

Code PUBO

OFFICIAL GAZETTE PUBLICATION CONFIRMATION E-MAILED

Jan 26, 2021

Code NPUB

NOTIFICATION OF NOTICE OF PUBLICATION E-MAILED

Jan 06, 2021

Code NONP

ASSIGNED TO EXAMINER

Dec 17, 2020

Code DOCK

APPROVED FOR PUB - PRINCIPAL REGISTER

Dec 17, 2020

Code CNSA

NEW APPLICATION OFFICE SUPPLIED DATA ENTERED

Sep 25, 2020

Code NWOS

NEW APPLICATION ENTERED

Aug 25, 2020

Code NWAP

MAINENG

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