US2565843A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multiple tubular combustion chamber
Assignee: Elliott Co
•
Filing: 1949-06-02
•
Granted: 1951-08-28
•
Expires: 1969-06-02
Abstract
No abstract record available.
Inventors
- 👤 Edward S Dennison
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 02:20
CPC Classifications
F; F23; F23R; F23R3/00; F23R3/42
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1801007A
Cited
US2078956A
Cited
US2410450A
Cited
US2402377A
Cited
US2446059A
Cited
US2447482A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-08-27 | 1955-02-26 | 1955-08-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-08-27 | 1959-02-26 | 1959-08-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-08-27 | 1963-02-26 | 1963-08-28 | $7700.00 | Window Closed / Lapsed |