US2658580A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Silencer for internal-combustion engines
Assignee: RECH S TECH ET D EXPL S IND SO
•
Filing: 1949-09-26
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Granted: 1953-11-10
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Expires: 1969-09-26
Abstract
No abstract record available.
Inventors
- 👤 Trembley Fernand
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 12:00
CPC Classifications
F; F01; F01N; F01N13/00; F01N13/08; B; B60; B60K; B60K13/00; B60K13/04; F01N3/00; F01N3/02; F01N3/05; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
DE249009C
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US861550A
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US877431A
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US1032794A
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US1490957A
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US1725878A
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US1732909A
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US1775511A
Cited
FR721292A
Cited
GB420347A
Cited
US2244800A
Cited
US2484826A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-11-09 | 1957-05-11 | 1957-11-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-11-09 | 1961-05-11 | 1961-11-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-11-09 | 1965-05-11 | 1965-11-10 | $7700.00 | Window Closed / Lapsed |