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US2182945A
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US
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Exhaust silencer
Assignee: Walker Manufacturing Co
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Filing: 1937-07-30
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Granted: 1939-12-12
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Expires: 1957-07-30
Abstract
No abstract record available.
Inventors
- 👤 Earl G Gunn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 17:12
CPC Classifications
F; F01; F01N; F01N1/00; F01N1/06; F01N1/02; F01N1/08; F01N1/084; F01N2490/00; F01N2490/15; F01N2490/155
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1942-12-11 | 1943-06-12 | 1943-12-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1946-12-11 | 1947-06-12 | 1947-12-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1950-12-11 | 1951-06-12 | 1951-12-12 | $7700.00 | Window Closed / Lapsed |