Who owns the SIGMA trademark?

The SIGMA trademark is owned by Sigma Theta Tau International Honor Society of Nursing, Inc..

What class is the SIGMA trademark registered in?

The SIGMA trademark is registered in Class 041 (Education & entertainment services).

What is the serial number for SIGMA?

The USPTO serial number for SIGMA is 88451239.

What is the registration number for SIGMA?

SIGMA is registered under USPTO registration number 5942918.

Sealvo

Home Search: SIGMASIGMA #88451239

Back

Updated Oct 20, 2026·37 searches this week

View on USPTO TSDR Find similar marks

SIG

USPTO Trademark Record

REGISTERED

SIGMA

SN 88451239·Reg 5942918·Filed May 29, 2019

Owner Sigma Theta Tau International Honor Society of Nursing, Inc.

Education; providing of training; entertainment; sporting and cultural activities.

SIGMA (Serial No. 88451239), Registration No. 5942918, is a registered US trademark filed on May 29, 2019 by Sigma Theta Tau International Honor Society of Nursing, Inc.. This trademark covers Class 041 (Education & entertainment services).

Section 8/9 declaration window: December 24, 2029

Mark Intelligence

SIGMA (Reg. #5942918) is a registered US trademark that has been protecting its owner, Sigma Theta Tau International Honor Society of Nursing, Inc., since 2019. The mark covers Class 041 (Education & entertainment services). Goods and services include Education; providing of training; entertainment; sporting and cultural activities.. The mark faced 1 opposition proceeding during prosecution.

FILED

May 29, 2019

SERIAL

88451239

REG#

5942918

REGISTERED

Dec 24, 2019

Filing Information

StatusREGISTERED

Filing DateMay 29, 2019

Serial Number88451239

Registration No.5942918

Registration DateDec 24, 2019

Status DateMar 20, 2026

Published for OppositionOct 08, 2019

Filing Basis & Declarations

Filed as Use ApplicationUse Application CurrentlySection 8 AcceptedSection 15 Acknowledged

Full Goods & Services

CLASSES

OFFICE

USPTO

COUNTRY

Class 041Education & entertainment services

US codes: 100, 101, 107

First use anywhere: Oct 28, 2017

First use in commerce: Oct 28, 2017

Education; providing of training; entertainment; sporting and cultural activities.

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

Run a conflict check

Search by serial number, mark name, or logo. See conflicting marks ranked by risk with clear explanations of what contributed.

Run conflict check

Status History

19 events

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

Mar 20, 2026

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

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

Mar 20, 2026

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

CASE ASSIGNED TO POST REGISTRATION PARALEGAL

Feb 23, 2026

CASE ASSIGNED TO POST REGISTRATION PARALEGAL

TEAS SECTION 8 & 15 RECEIVED

Nov 18, 2025

TEAS SECTION 8 & 15 RECEIVED

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

Dec 24, 2024

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

REGISTERED-PRINCIPAL REGISTER

Dec 24, 2019

REGISTERED-PRINCIPAL REGISTER

PUBLISHED FOR OPPOSITION

Oct 08, 2019

PUBLISHED FOR OPPOSITION

OFFICIAL GAZETTE PUBLICATION CONFIRMATION E-MAILED

Oct 08, 2019

OFFICIAL GAZETTE PUBLICATION CONFIRMATION E-MAILED

NOTIFICATION OF NOTICE OF PUBLICATION E-MAILED

Sep 18, 2019

NOTIFICATION OF NOTICE OF PUBLICATION E-MAILED

ASSIGNED TO LIE

Sep 02, 2019

ASSIGNED TO LIE

EXAMINERS AMENDMENT -WRITTEN

Aug 23, 2019

EXAMINERS AMENDMENT -WRITTEN

EXAMINERS AMENDMENT E-MAILED

Aug 23, 2019

EXAMINERS AMENDMENT E-MAILED

NOTIFICATION OF EXAMINERS AMENDMENT E-MAILED

Aug 23, 2019

NOTIFICATION OF EXAMINERS AMENDMENT E-MAILED

EXAMINER'S AMENDMENT ENTERED

Aug 23, 2019

EXAMINER'S AMENDMENT ENTERED

APPROVED FOR PUB - PRINCIPAL REGISTER

Aug 23, 2019

APPROVED FOR PUB - PRINCIPAL REGISTER

ASSIGNED TO EXAMINER

Aug 19, 2019

ASSIGNED TO EXAMINER

NOTICE OF DESIGN SEARCH CODE E-MAILED

Jun 14, 2019

NOTICE OF DESIGN SEARCH CODE E-MAILED

NEW APPLICATION OFFICE SUPPLIED DATA ENTERED

Jun 13, 2019

NEW APPLICATION OFFICE SUPPLIED DATA ENTERED

NEW APPLICATION ENTERED

Jun 01, 2019

NEW APPLICATION ENTERED

Other Marks by Sigma Theta Tau International Honor Society of Nursing, Inc.

Additional USPTO filings from the same owner.

LOG

LogoMark

86210006

Sigma Theta Tau International Honor Society of Nursing, Inc.

REGISTERED

LOG

LogoMark

97723116

Sigma Theta Tau International Honor Society of Nursing, Inc.

REGISTERED

GAP

GAPFON GLOBAL ADVISORY PANEL ON THE FUTURE OF NURSING & MIDWIFERY BRIDGING THE GAPS FOR HEALTH

87073778

Sigma Theta Tau International Honor Society of Nursing, Inc.

REGISTERED

SIG

SIGMA THETA TAU

76501423

Sigma Theta Tau International Honor Society of Nursing, Inc.

REGISTERED

Other Marks in Class 041 — Education & entertainment services

Recently filed and registered marks in the same international class.

SIG

SIGMA

99430724

SIGMA ALIMENTOS, S.A. DE C.V.

REGISTERED

SIG

SIGMA

99437438

SG TM Ltd

REGISTERED

SIG

SIGMA

97457483

SG TM LTD.

REGISTERED

SIG

SIGMA

79172645

SIGMAHQ LTD

REGISTERED

Other Marks by Katie Miller

Additional USPTO filings handled by the same attorney of record.

CCS

CCS SAFESITE

88917941

REGISTERED

DAR

DARLING DAKOTA

99007893

REGISTERED

IPS

IPSCORE

98851591

REGISTERED

ALL

ALLOCATE LIFE

98851822

REGISTERED

SIGMA

Run a conflict check

Other Marks by Sigma Theta Tau International Honor Society of Nursing, Inc.

Other Marks in Class 041 — Education & entertainment services

Other Marks by Katie Miller

Get pre-filing clearance

Search 14M+ trademarks

Resources

Company