Who owns the PROOF-OF-INDEX trademark?

The PROOF-OF-INDEX trademark is owned by Centrifuge Network Foundation, Inc..

What class is the PROOF-OF-INDEX trademark registered in?

The PROOF-OF-INDEX trademark is registered in Class 042 (Scientific, technology & SaaS services).

What is the serial number for PROOF-OF-INDEX?

The USPTO serial number for PROOF-OF-INDEX is 99330260.

What is the registration number for PROOF-OF-INDEX?

PROOF-OF-INDEX is registered under USPTO registration number 0.

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Updated Oct 2, 2026·30 searches this week

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USPTO Trademark Record

ABANDONED

PROOF-OF-INDEX

SN 99330260·Reg 0·Filed Aug 11, 2025

Owner Centrifuge Network Foundation, Inc.

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.

PROOF-OF-INDEX (Serial No. 99330260), Registration No. 0, is a abandoned US trademark filed on Aug 11, 2025 by Centrifuge Network Foundation, Inc.. This trademark covers Class 042 (Scientific, technology & SaaS services).

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PROOF-OF-INDEX (Reg. #0) is an abandoned US trademark that was filed in 2025 but has since been abandoned. The mark covers Class 042 (Scientific, technology & SaaS services). Goods and services include Scientific and technological services and research and design relating thereto; industrial analysis, industrial research....

FILED

Aug 11, 2025

SERIAL

99330260

REG#

REGISTERED

Dec 31, 1969

Filing Information

StatusABANDONED

Filing DateAug 11, 2025

Serial Number99330260

Registration No.0

Registration DateDec 31, 1969

Status DateMay 15, 2026

Mark TypeStandard characters

Filing Basis & Declarations

Standard Characters ClaimedFiled as Use ApplicationUse Application Currently

Full Goods & Services

CLASSES

OFFICE

USPTO

COUNTRY

Class 042Scientific, technology & SaaS services

US codes: 100, 101

First use anywhere: Jul 01, 2025

First use in commerce: Jul 01, 2025

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

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Status History

9 events

ABANDONMENT - FAILURE TO RESPOND OR LATE RESPONSE

May 15, 2026

ABANDONMENT - FAILURE TO RESPOND OR LATE RESPONSE

ABANDONMENT NOTICE E-MAILED - FAILURE TO RESPOND

May 15, 2026

ABANDONMENT NOTICE E-MAILED - FAILURE TO RESPOND

NON-FINAL ACTION WRITTEN

Jan 27, 2026

NON-FINAL ACTION WRITTEN

NON-FINAL ACTION E-MAILED

Jan 27, 2026

NON-FINAL ACTION E-MAILED

NOTIFICATION OF NON-FINAL ACTION E-MAILED

Jan 27, 2026

NOTIFICATION OF NON-FINAL ACTION E-MAILED

ASSIGNED TO EXAMINER

Dec 23, 2025

ASSIGNED TO EXAMINER

NEW APPLICATION OFFICE SUPPLIED DATA ENTERED

Dec 22, 2025

NEW APPLICATION OFFICE SUPPLIED DATA ENTERED

NEW APPLICATION ENTERED

Aug 11, 2025

NEW APPLICATION ENTERED

APPLICATION FILING RECEIPT MAILED

Aug 11, 2025

APPLICATION FILING RECEIPT MAILED

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Additional USPTO filings from the same owner.

CEN

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RWA

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