US2576522A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Engine silencer with transverse baffle structure
Assignee: Individual
•
Filing: 1947-11-10
•
Granted: 1951-11-27
•
Expires: 1967-11-10
Abstract
No abstract record available.
Inventors
- 👤 Kyffin Frank Hankinson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 16:13
CPC Classifications
F; F01; F01N; F01N1/00; F01N1/08; F01N1/089
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1173583A
Cited
US1972065A
Cited
US2189424A
Cited
US2225650A
Cited
GB507463A
Cited
US2150768A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-11-26 | 1955-05-28 | 1955-11-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-11-26 | 1959-05-28 | 1959-11-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-11-26 | 1963-05-28 | 1963-11-27 | $7700.00 | Window Closed / Lapsed |