Patent US2548563A successfully refreshed from Google Patents.
US2548563A
Expired / Lapsed
US
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Air-cooled exhaust silencer
Assignee: Individual
•
Filing: 1948-09-24
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Granted: 1951-04-10
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Expires: 1968-09-24
Abstract
No abstract record available.
Inventors
- 👤 Smith Ellis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 15:44
CPC Classifications
F; F01; F01N; F01N13/00; F01N13/20; F01N1/00; F01N1/14; 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)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-04-09 | 1954-10-09 | 1955-04-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-04-09 | 1958-10-09 | 1959-04-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-04-09 | 1962-10-09 | 1963-04-10 | $7700.00 | Window Closed / Lapsed |