US2635564A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Combustion system for pulverulent fuel
Assignee: Power Jets Research and Development Ltd
•
Filing: 1949-10-03
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Granted: 1953-04-21
•
Expires: 1969-10-03
Abstract
No abstract record available.
Inventors
- 👤 Hans A Havemann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 06:49
CPC Classifications
F; F23; F23C; F23C3/00; F23C3/006; F23C3/008
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US858640A
Cited
US1618808A
Cited
US1676511A
Cited
GB289930A
Cited
US1721879A
Cited
FR677413A
Cited
US1918397A
Cited
US2434298A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-04-20 | 1956-10-20 | 1957-04-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-04-20 | 1960-10-20 | 1961-04-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-04-20 | 1964-10-20 | 1965-04-21 | $7700.00 | Window Closed / Lapsed |