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US2800092A
Expired / Lapsed
US
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Burning of pulverized fuel
Assignee: Pollopas Patents Ltd
•
Filing: 1952-02-08
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Granted: 1957-07-23
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Expires: 1972-02-08
Abstract
No abstract record available.
Inventors
- 👤 Burg Hans
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 05:02
CPC Classifications
F; F23; F23C; F23C3/00; F23C3/006; F23C3/008
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1618808A
Cited
US1762505A
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GB289930A
Cited
US1910735A
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FR661472A
Cited
US1943286A
Cited
GB350051A
Cited
US1946011A
Cited
DE675113C
Cited
US2357301A
Cited
US2413586A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-07-22 | 1961-01-21 | 1961-07-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-07-22 | 1965-01-21 | 1965-07-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-07-22 | 1969-01-21 | 1969-07-23 | $7700.00 | Window Closed / Lapsed |