Patent US4225003A successfully refreshed from Google Patents.
Patent US2828830A successfully refreshed from Google Patents.
US2828830A
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Non-directional muffler
Assignee: Individual
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Filing: 1956-10-08
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Granted: 1958-04-01
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Expires: 1976-10-08
Abstract
No abstract record available.
Inventors
- 👤 John C Clark
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 14:49
CPC Classifications
F; F01; F01N; F01N13/00; F01N13/18; F01N1/00; F01N1/06; F01N1/08; F01N2470/00; F01N2470/02; F01N2470/24
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
FR579275A
Cited
US1857845A
Cited
US1993397A
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US2016253A
Cited
US1998385A
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US2083840A
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FR976458A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-03-31 | 1961-09-30 | 1962-04-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-03-31 | 1965-09-30 | 1966-04-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-03-31 | 1969-09-30 | 1970-04-01 | $7700.00 | Window Closed / Lapsed |