Patent US1783092A successfully refreshed from Google Patents.
US1783092A
Expired / Lapsed
US
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Agitator for coal hoppers
Assignee: Frederick Iron & Steel Co
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Filing: 1930-04-08
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Granted: 1930-11-25
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Expires: 1950-04-08
Abstract
No abstract record available.
Inventors
- 👤 Basil C Lewis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:14
CPC Classifications
F; F23; F23K; F23K3/00; F23K2203/00; F23K2203/002; Y; Y10; Y10S; Y10S119/00; Y10S119/901; Y10S119/902
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) | 1933-11-24 | 1934-05-26 | 1934-11-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1937-11-24 | 1938-05-26 | 1938-11-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1941-11-24 | 1942-05-26 | 1942-11-25 | $7700.00 | Window Closed / Lapsed |