MAINSPRING THERAPEUTICS
Live / Applied — Second extension granted (statement of use) (as of 20 Mar 2026)
What this means for you
Not registered yet, but its 31 Jul 2024 filing date beats anything filed after it. If it registers, the owner can stop confusingly similar uses in the classes it covers.
Record
- Serial number
- 98676674
- Mark type
- Stylized text
- Filed
- 31 Jul 2024
- Published for opposition
- 04 Mar 2025
- Attorney of record
- Brian D Gildea
Goods and services
- Class 005 — Pharmaceuticals: biological preparations for the prevention and treatment of cellular abnormalities.; Biopharmaceutical preparations for the prevention and treatment of mitochondrial, cardiovascular, renal, ophthalmic, neurologic, myopathic and metabolic diseases and disorders
- Class 042 — Scientific and technological services: biopharmaceutical research, development and testing; Scientific research and development; medical and scientific research in the mitochondrial, cardiovascular, renal, ophthalmic, neurologic, myopathic and metabolic system fields.
Owner
- Stealth BioTherapeutics Inc., Needham, MA, US
- Stealth BioTherapeutics Inc., Needham, MA, US
Prosecution history
- 21 Mar 2026 — NOTICE OF APPROVAL OF EXTENSION REQUEST E-MAILED
- 20 Mar 2026 — SOU EXTENSION 2 GRANTED
- 20 Mar 2026 — SOU EXTENSION 2 FILED
- 20 Mar 2026 — SOU TEAS EXTENSION RECEIVED
- 16 Oct 2025 — NOTICE OF APPROVAL OF EXTENSION REQUEST E-MAILED
- 16 Oct 2025 — SOU EXTENSION 1 GRANTED
- 16 Oct 2025 — SOU EXTENSION 1 FILED
- 16 Oct 2025 — SOU TEAS EXTENSION RECEIVED
- 29 Apr 2025 — NOA E-MAILED - SOU REQUIRED FROM APPLICANT
- 04 Mar 2025 — PUBLISHED FOR OPPOSITION
- 04 Mar 2025 — OFFICIAL GAZETTE PUBLICATION CONFIRMATION E-MAILED
- 26 Feb 2025 — NOTIFICATION OF NOTICE OF PUBLICATION E-MAILED
- 07 Feb 2025 — APPROVED FOR PUB - PRINCIPAL REGISTER
- 07 Feb 2025 — EXAMINER'S AMENDMENT ENTERED
- 07 Feb 2025 — NOTIFICATION OF EXAMINERS AMENDMENT E-MAILED