US2924334A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Coal-sizing screen
Assignee: Individual
•
Filing: 1956-11-07
•
Granted: 1960-02-09
•
Expires: 1976-11-07
Abstract
No abstract record available.
Inventors
- 👤 Ben F Hendrickson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 11:01
CPC Classifications
B; B07; B07B; B07B1/00; B07B1/46; B07B1/4609
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US327050A
Cited
US419907A
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US1314194A
Cited
US2080884A
Cited
US1260409A
Cited
GB303970A
Cited
US1961534A
Cited
US2362099A
Cited
GB691617A
Cited
US2690265A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-02-08 | 1963-08-10 | 1964-02-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-02-08 | 1967-08-10 | 1968-02-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-02-08 | 1971-08-10 | 1972-02-09 | $7700.00 | Window Closed / Lapsed |