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US2680949A
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US
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Internal-combustion turbine having rotating combustion chambers
Assignee: Individual
•
Filing: 1951-10-18
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Granted: 1954-06-15
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Expires: 1971-10-18
Abstract
No abstract record available.
Inventors
- 👤 Butler Frank David
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 14:45
CPC Classifications
F; F02; F02C; F02C5/00; F02C5/02; F02C5/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US332040A
Cited
US1200133A
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US1271777A
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US1339730A
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US1340563A
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US1934237A
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US2222183A
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US2310513A
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US2561005A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-06-14 | 1957-12-14 | 1958-06-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-06-14 | 1961-12-14 | 1962-06-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-06-14 | 1965-12-14 | 1966-06-15 | $7700.00 | Window Closed / Lapsed |