Patent US2879836A successfully refreshed from Google Patents.
US2879836A
Expired / Lapsed
US
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Combustion chamber air feeding attachment
Assignee: Individual
•
Filing: 1957-03-20
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Granted: 1959-03-31
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Expires: 1977-03-20
Abstract
No abstract record available.
Inventors
- 👤 Dumas Albert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 15:21
CPC Classifications
F; F23; F23C; F23C7/00; F23C7/002; F23C7/004
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
DE346509C
Cited
US1420441A
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DE376570C
Cited
US1495859A
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US1914355A
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US2334314A
Cited
US2806517A
Cited
US2800092A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-03-30 | 1962-09-29 | 1963-03-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-03-30 | 1966-09-29 | 1967-03-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-03-30 | 1970-09-29 | 1971-03-31 | $7700.00 | Window Closed / Lapsed |