US1656576A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Muffler for airplane motors
Assignee: Individual
•
Filing: 1926-06-16
•
Granted: 1928-01-17
•
Expires: 1946-06-16
Abstract
No abstract record available.
Inventors
- 👤 Manley S Sullivan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 13:46
CPC Classifications
F; F02; F02B; F02B35/00; F02B35/02; F01; F01N; F01N1/00; F01N1/14; F01N1/16; F01N1/18; F01N3/00; F01N3/02; F01N3/04; F01N3/05; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1931-01-16 | 1931-07-18 | 1932-01-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1935-01-16 | 1935-07-18 | 1936-01-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1939-01-16 | 1939-07-18 | 1940-01-17 | $7700.00 | Window Closed / Lapsed |