US1771999A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Carbonization process and apparatus therefor
Assignee: OLD BEN COAL Corp
•
Filing: 1924-09-18
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Granted: 1930-08-05
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Expires: 1944-09-18
Abstract
No abstract record available.
Inventors
- 👤 Frank C Greene
- 👤 Irving F Laucks
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 14:56
CPC Classifications
C; C10; C10B; C10B7/00; C10B7/10
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1933-08-04 | 1934-02-03 | 1934-08-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1937-08-04 | 1938-02-03 | 1938-08-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1941-08-04 | 1942-02-03 | 1942-08-05 | $7700.00 | Window Closed / Lapsed |