Who owns the STACK EXCHANGE trademark?

The STACK EXCHANGE trademark is owned by Stack Exchange, Inc..

What is the serial number for STACK EXCHANGE?

The USPTO serial number for STACK EXCHANGE is 87772615.

What is the registration number for STACK EXCHANGE?

STACK EXCHANGE is registered under USPTO registration number 5694775.

STACK EXCHANGE - Owned by Stack Exchange, Inc. - (Class 009, Class 042)

Q: What class is the STACK EXCHANGE trademark registered in?

The STACK EXCHANGE trademark is registered in Class 009 (Electronics, software & scientific instruments), Class 042 (Scientific, technology & SaaS services).

What to file next

Section 9 renewal, filed with a Section 8 declaration

When: Due between the ninth and tenth anniversary of registration, then before each tenth anniversary after that.
Extensions and grace: A six-month grace period follows, with an added per-class fee.
If it is missed: A missed renewal cancels the registration, and there is no revival route for it.

How Section 9 renewal 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 009Electronics, software & scientific instruments

US codes: 021, 023, 026, 036, 038

First use anywhere: Jan 31, 2014

First use in commerce: Jan 31, 2014

Scientific, research, navigation, surveying, photographic, cinematographic, audiovisual, optical, weighing, measuring, signalling, detecting, testing, inspecting, life-saving and teaching apparatus and instruments; apparatus and instruments for conducting, switching, transforming, accumulating, regulating or controlling the distribution or use of electricity; apparatus and instruments for recording, transmitting, reproducing or processing sound, images or data; recorded and downloadable multimedia files, computer software, blank digital or analogue recording and storage media; mechanisms for coin-operated apparatus; cash registers, calculating devices; computers and computer peripheral devices; diving suits, divers' masks, ear plugs for divers, nose clips for divers, gloves for divers, breathing apparatus for underwater swimming; fire-extinguishing apparatus.

Class 042Scientific, technology & SaaS services

US codes: 100, 101

First use anywhere: Apr 16, 2008

First use in commerce: Jan 02, 2009

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.

Filing Basis & Declarations

Standard Characters ClaimedFiled as Use ApplicationUse Application CurrentlySection 8 AcceptedSection 15 AcknowledgedTrademark

International Filings

Madrid Protocol1 filings

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

1436068

480Oct 04, 2018

Source: USPTO Madrid International Filing Requests

Status History

23 events

CASE ASSIGNED TO POST REGISTRATION PARALEGAL

Jul 01, 2025

Code APRE

REGISTERED - SEC. 8 (6-YR) ACCEPTED & SEC. 15 ACK.

Jul 01, 2025

Code C15A

NOTICE OF ACCEPTANCE OF SEC. 8 & 15 - E-MAILED

Jul 01, 2025

Code NA85

TEAS SECTION 8 & 15 RECEIVED

Mar 06, 2025

Code E815

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

Mar 12, 2024

Code REM1

REGISTERED-PRINCIPAL REGISTER

Mar 12, 2019

Code R.PR

OFFICIAL GAZETTE PUBLICATION CONFIRMATION E-MAILED

Dec 25, 2018

Code NPUB

PUBLISHED FOR OPPOSITION

Dec 25, 2018

Code PUBO

NOTIFICATION OF NOTICE OF PUBLICATION E-MAILED

Dec 05, 2018

Code NONP

ASSIGNED TO LIE

Nov 16, 2018

Code ALIE

APPROVED FOR PUB - PRINCIPAL REGISTER

Nov 05, 2018

Code CNSA

EXAMINERS AMENDMENT -WRITTEN

Nov 05, 2018

Code CNEA

EXAMINERS AMENDMENT E-MAILED

Nov 05, 2018

Code GNEA

NOTIFICATION OF EXAMINERS AMENDMENT E-MAILED

Nov 05, 2018

Code GNEN

EXAMINER'S AMENDMENT ENTERED

Nov 05, 2018

Code XAEC

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

Sep 20, 2018

Code REAP

ATTORNEY/DOM.REP.REVOKED AND/OR APPOINTED

Sep 20, 2018

Code ARAA

NOTIFICATION OF NON-FINAL ACTION E-MAILED

May 10, 2018

Code GNRN

NON-FINAL ACTION E-MAILED

May 10, 2018

Code GNRT

NON-FINAL ACTION WRITTEN

May 10, 2018

Code CNRT

ASSIGNED TO EXAMINER

May 08, 2018

Code DOCK

NEW APPLICATION OFFICE SUPPLIED DATA ENTERED

Feb 07, 2018

Code NWOS

NEW APPLICATION ENTERED

Jan 30, 2018

Code NWAP

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STACK EXCHANGE

What to file next

Full Goods & Services

Filing Basis & Declarations

International Filings

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