US2501794A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Silencer with elongated pipe connecting plural chambers
Assignee: Fluor Corp
•
Filing: 1946-01-26
•
Granted: 1950-03-28
•
Expires: 1966-01-26
Abstract
No abstract record available.
Inventors
- 👤 Foster M Stephens
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 13:33
CPC Classifications
F; F01; F01N; F01N13/00; F01N13/007; F01N1/00; F01N1/06; F01N1/08; F01N1/084; F02; F02M; F02M35/00; F02M35/12; F02M35/1205; F02M35/1227; F02M35/1233
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1280386A
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US1291271A
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US1542829A
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US1553264A
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US1572116A
Cited
US1655230A
Cited
US1739039A
Cited
US2046252A
Cited
US2194928A
Cited
US2353036A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-03-27 | 1953-09-26 | 1954-03-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-03-27 | 1957-09-26 | 1958-03-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-03-27 | 1961-09-26 | 1962-03-28 | $7700.00 | Window Closed / Lapsed |