US2909133A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for drying comminuted coal containing fine particles and dust
Assignee: Combustion Engineering Inc
•
Filing: 1956-11-23
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Granted: 1959-10-20
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Expires: 1976-11-23
Abstract
No abstract record available.
Inventors
- 👤 Charles W Gordon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 00:52
CPC Classifications
B; B04; B04C; B04C5/00; B04C5/12; B04C5/13; F; F26; F26B; F26B17/00; F26B17/10; F26B17/101; F26B23/00; F26B23/02; F26B23/028
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-10-19 | 1963-04-20 | 1963-10-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-10-19 | 1967-04-20 | 1967-10-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-10-19 | 1971-04-20 | 1971-10-20 | $7700.00 | Window Closed / Lapsed |