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Patent US2838128A successfully refreshed from Google Patents.
US2838128A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Engine exhaust muffler
Assignee: Individual
•
Filing: 1955-08-30
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Granted: 1958-06-10
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Expires: 1975-08-30
Abstract
No abstract record available.
Inventors
- 👤 Sr Edward A Kliewer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 14:20
CPC Classifications
F; F01; F01N; F01N1/00; F01N1/08; F01N1/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US806715A
Cited
US2239549A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-06-09 | 1961-12-09 | 1962-06-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-06-09 | 1965-12-09 | 1966-06-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-06-09 | 1969-12-09 | 1970-06-10 | $7700.00 | Window Closed / Lapsed |