US2989090A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Charcoal settling conveyor
Assignee: Diamond National Corp
•
Filing: 1958-04-18
•
Granted: 1961-06-20
•
Expires: 1978-04-18
Abstract
No abstract record available.
Inventors
- 👤 Harry A Wolter
- 👤 Thomas N Bushey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 14:10
CPC Classifications
B; B65; B65B; B65B1/00; B65B1/20; B65B1/22
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US328439A
Cited
US737054A
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US1826926A
Cited
US1914262A
Cited
US2379230A
Cited
US2675154A
Cited
US2775987A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-06-19 | 1964-12-19 | 1965-06-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-06-19 | 1968-12-19 | 1969-06-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-06-19 | 1972-12-19 | 1973-06-20 | $7700.00 | Window Closed / Lapsed |