Who owns the STACK OVERFLOW trademark?

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

What is the serial number for STACK OVERFLOW?

The USPTO serial number for STACK OVERFLOW is 87772598.

What is the registration number for STACK OVERFLOW?

STACK OVERFLOW is registered under USPTO registration number 5803103.

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

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

The STACK OVERFLOW 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: Mar 31, 2016

First use in commerce: Mar 31, 2016

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.

1447129

480Oct 04, 2018

Source: USPTO Madrid International Filing Requests

Status History

29 events

CASE ASSIGNED TO POST REGISTRATION PARALEGAL

Oct 30, 2025

Code APRE

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

Oct 30, 2025

Code C15A

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

Oct 30, 2025

Code NA85

TEAS SECTION 8 & 15 RECEIVED

Jul 03, 2025

Code E815

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

Jul 16, 2024

Code REM1

REGISTERED-PRINCIPAL REGISTER

Jul 16, 2019

Code R.PR

PUBLISHED FOR OPPOSITION

Apr 30, 2019

Code PUBO

OFFICIAL GAZETTE PUBLICATION CONFIRMATION E-MAILED

Apr 30, 2019

Code NPUB

NOTIFICATION OF NOTICE OF PUBLICATION E-MAILED

Apr 10, 2019

Code NONP

APPROVED FOR PUB - PRINCIPAL REGISTER

Mar 20, 2019

Code CNSA

CORRESPONDENCE RECEIVED IN LAW OFFICE

Mar 05, 2019

Code CRFA

TEAS/EMAIL CORRESPONDENCE ENTERED

Mar 05, 2019

Code TEME

APPLICANT/CORRESPONDENCE CHANGES (NON-RESPONSIVE) ENTERED

Mar 05, 2019

Code CHAN

ASSIGNED TO LIE

Mar 01, 2019

Code ALIE

TEAS RESPONSE TO SUSPENSION INQUIRY RECEIVED

Feb 26, 2019

Code ERSI

SUSPENSION LETTER WRITTEN

Oct 26, 2018

Code CNSL

NOTIFICATION OF LETTER OF SUSPENSION E-MAILED

Oct 26, 2018

Code GNS3

LETTER OF SUSPENSION E-MAILED

Oct 26, 2018

Code GNSL

CORRESPONDENCE RECEIVED IN LAW OFFICE

Oct 08, 2018

Code CRFA

TEAS/EMAIL CORRESPONDENCE ENTERED

Oct 08, 2018

Code TEME

TEAS RESPONSE TO OFFICE ACTION RECEIVED

Oct 08, 2018

Code TROA

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

NON-FINAL ACTION WRITTEN

May 10, 2018

Code CNRT

NON-FINAL ACTION E-MAILED

May 10, 2018

Code GNRT

NOTIFICATION OF NON-FINAL ACTION E-MAILED

May 10, 2018

Code GNRN

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 OVERFLOW

What to file next

Full Goods & Services

Filing Basis & Declarations

International Filings

Other Marks by Stack Exchange, Inc.

Other Marks in Class 009 — Electronics, software & scientific instruments

Other Marks by Michael A. Geller

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