| Serial Number | 99413034 |
| Word Mark | MAINSTAY |
| Filing Date | Thursday, September 25, 2025 |
| Status | 819 - SU - REGISTRATION REVIEW COMPLETE |
| Status Date | Monday, July 20, 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 | Tuesday, February 24, 2026 |
| Goods and Services | Real estate consultation; Real estate valuations; Real estate investment services; Real estate investment consultancy; Financial due diligence services in the field of real estate; Providing a database of information about residential real estate listings in different neighborhoods and communities |
| Pseudo Mark | MAIN STAY |
| International Class | 036 - Insurance; financial affairs; monetary affairs; real estate affairs. |
| US Class Codes | 100, 101, 102 |
| Class Status Code | 6 - Active |
| Class Status Date | Thursday, September 25, 2025 |
| Primary Code | 036 |
| First Use Anywhere Date | Thursday, August 1, 2024 |
| First Use In Commerce Date | Thursday, August 1, 2024 |
| Party Name | Mainstay Labs Inc. |
| Party Type | 20 - Owner at Publication |
| Legal Entity Type | 03 - Corporation |
| Address | San Francisco, CA 94104 US |
| Party Name | Mainstay Labs Inc. |
| Party Type | 10 - Original Applicant |
| Legal Entity Type | 03 - Corporation |
| Address | San Francisco, CA 94104 US |
| Event Date | Event Description |
| Thursday, September 25, 2025 | NEW APPLICATION ENTERED |
| Thursday, September 25, 2025 | NEW APPLICATION OFFICE SUPPLIED DATA ENTERED |
| Thursday, September 25, 2025 | APPLICATION FILING RECEIPT MAILED |
| Tuesday, December 23, 2025 | TEAS CHANGE OF OWNER ADDRESS RECEIVED |
| Tuesday, December 23, 2025 | APPLICANT/CORRESPONDENCE CHANGES (NON-RESPONSIVE) ENTERED |
| Tuesday, December 23, 2025 | TEAS CHANGE OF CORRESPONDENCE RECEIVED |
| Monday, February 2, 2026 | ASSIGNED TO EXAMINER |
| Monday, February 2, 2026 | APPROVED FOR PUB - PRINCIPAL REGISTER |
| Wednesday, February 18, 2026 | NOTIFICATION OF NOTICE OF PUBLICATION E-MAILED |
| Tuesday, February 24, 2026 | PUBLISHED FOR OPPOSITION |
| Tuesday, February 24, 2026 | OFFICIAL GAZETTE PUBLICATION CONFIRMATION E-MAILED |
| Tuesday, April 21, 2026 | NOA E-MAILED - SOU REQUIRED FROM APPLICANT |
| Friday, May 8, 2026 | TEAS STATEMENT OF USE RECEIVED |
| Saturday, July 18, 2026 | CASE ASSIGNED TO INTENT TO USE PARALEGAL |
| Friday, May 8, 2026 | USE AMENDMENT FILED |
| Saturday, July 18, 2026 | STATEMENT OF USE PROCESSING COMPLETE |
| Monday, July 20, 2026 | ALLOWED PRINCIPAL REGISTER - SOU ACCEPTED |
| Monday, July 20, 2026 | NOTICE OF ACCEPTANCE OF STATEMENT OF USE E-MAILED |