US2644542A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Silencer with plural expansion chambers and outlet conduits
Assignee: Maxim Silencer Co
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Filing: 1951-06-23
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Granted: 1953-07-07
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Expires: 1971-06-23
Abstract
No abstract record available.
Inventors
- 👤 Roland B Bourne
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 21:29
CPC Classifications
F; F01; F01N; F01N13/00; F01N13/002; F01N1/00; F01N1/08; F01N2590/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-07-06 | 1957-01-05 | 1957-07-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-07-06 | 1961-01-05 | 1961-07-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-07-06 | 1965-01-05 | 1965-07-07 | $7700.00 | Window Closed / Lapsed |