| Serial Number | 99390260 |
| Word Mark | PROOFSTACK |
| Filing Date | Friday, September 12, 2025 |
| Status | 680 - APPROVED FOR PUBLICATION |
| Status Date | Saturday, February 7, 2026 |
| Registration Number | 0000000 |
| Registration Date | NOT AVAILABLE |
| Mark Drawing | 4 - Illustration: Drawing with word(s) / letter(s) / number(s) in Block form |
| Published for Opposition Date | NOT AVAILABLE |
| Goods and Services | Downloadable computer application software for mobile phones, namely, software for encryption, secure data storage, secure file sharing, secure messaging, and cryptographic proof management |
| Pseudo Mark | PROOF STACK |
| Goods and Services | Software as a service (SAAS) services featuring software for encryption, secure communication, cryptographic proof verification, digital integrity proofs, policy enforcement, and digital rights management; Platform as a service (PAAS) featuring computer software platforms for managing cryptographic proofs, data integrity verification, and post-quantum secure communication |
| International Class | 009 - Scientific, nautical, surveying, photographic, cinematographic, optical, weighing, measuring, signalling, checking (supervision), life-saving and teaching apparatus and instruments; apparatus and instruments for conducting, switching, transforming, accumulating, regulating or controlling electricity; apparatus for recording, transmission or reproduction of sound or images; magnetic data carriers, recording discs; automatic vending machines and mechanisms for coin operated apparatus; cash registers, calculating machines, data processing equipment and computers; fire extinguishing apparatus. |
| US Class Codes | 021, 023, 026, 036, 038 |
| Class Status Code | 6 - Active |
| Class Status Date | Friday, September 12, 2025 |
| Primary Code | 009 |
| First Use Anywhere Date | NOT AVAILABLE |
| First Use In Commerce Date | NOT AVAILABLE |
| International Class | 042 - Scientific and technological services and research and design relating thereto; industrial analysis and research services; design and development of computer hardware and software. |
| US Class Codes | 100, 101 |
| Class Status Code | 6 - Active |
| Class Status Date | Friday, September 12, 2025 |
| Primary Code | 042 |
| First Use Anywhere Date | NOT AVAILABLE |
| First Use In Commerce Date | NOT AVAILABLE |
| Party Name | NOT AVAILABLE |
| Party Type | 10 - Original Applicant |
| Legal Entity Type | 01 - Individual |
| Address | Saint Paul, MN 55106 |
| Event Date | Event Description |
| Friday, September 12, 2025 | NEW APPLICATION ENTERED |
| Friday, September 12, 2025 | APPLICATION FILING RECEIPT MAILED |
| Thursday, February 5, 2026 | NEW APPLICATION OFFICE SUPPLIED DATA ENTERED |
| Friday, February 6, 2026 | ASSIGNED TO EXAMINER |
| Saturday, February 7, 2026 | EXAMINERS AMENDMENT -WRITTEN |
| Saturday, February 7, 2026 | EXAMINERS AMENDMENT E-MAILED |
| Saturday, February 7, 2026 | NOTIFICATION OF EXAMINERS AMENDMENT E-MAILED |
| Saturday, February 7, 2026 | EXAMINER'S AMENDMENT ENTERED |
| Saturday, February 7, 2026 | APPROVED FOR PUB - PRINCIPAL REGISTER |