US2652899A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Silencer with a resonance chamber
Assignee: Air Maze Corp
•
Filing: 1948-02-13
•
Granted: 1953-09-22
•
Expires: 1968-02-13
Abstract
No abstract record available.
Inventors
- 👤 George M Walton
- 👤 Richard E Brown
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 21:59
CPC Classifications
F; F16; F16L; F16L55/00; F16L55/02; F02; F02M; F02M35/00; F02M35/12; F02M35/1255; F02M35/14; Y; Y10; Y10S; Y10S55/00; Y10S55/21
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1115873A
Cited
US1909511A
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GB351565A
Cited
US2323955A
Cited
US2020903A
Cited
US2064207A
Cited
US2037384A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-09-21 | 1957-03-23 | 1957-09-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-09-21 | 1961-03-23 | 1961-09-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-09-21 | 1965-03-23 | 1965-09-22 | $7700.00 | Window Closed / Lapsed |