US2724904A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Coal drying system with trap
Assignee: Combustion Engineering Inc
•
Filing: 1953-01-27
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Granted: 1955-11-29
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Expires: 1973-01-27
Abstract
No abstract record available.
Inventors
- 👤 Charles W Gordon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 16:09
CPC Classifications
F; F26; F26B; F26B17/00; F26B17/10; F26B17/101; C; C10; C10B; C10B57/00; C10B57/08; C10B57/10
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US748893A
Cited
US1024297A
Cited
GB215812A
Cited
US1766030A
Cited
US2047568A
Cited
US2296159A
Cited
US2313956A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-11-28 | 1959-05-30 | 1959-11-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-11-28 | 1963-05-30 | 1963-11-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-11-28 | 1967-05-30 | 1967-11-29 | $7700.00 | Window Closed / Lapsed |