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US2445045A
Expired / Lapsed
US
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Sound-trapping muffler construction
Assignee: Individual
•
Filing: 1944-06-26
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Granted: 1948-07-13
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Expires: 1964-06-26
Abstract
No abstract record available.
Inventors
- 👤 Strachan Christopher
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 21:47
CPC Classifications
F; F01; F01N; F01N13/00; F01N13/18; F01N1/00; F01N1/08; F01N1/12; F01N2470/00; F01N2470/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US825010A
Cited
US1584215A
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US1683084A
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US1953123A
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US2038309A
Cited
US2116751A
Cited
US2265342A
Cited
US2359365A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-07-13 | 1952-01-12 | 1952-07-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-07-13 | 1956-01-12 | 1956-07-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-07-13 | 1960-01-12 | 1960-07-13 | $7700.00 | Window Closed / Lapsed |