US2321389A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ash disposal apparatus for stokers
Assignee: POCAHONTAS FUEL Co Inc
•
Filing: 1941-03-21
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Granted: 1943-06-08
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Expires: 1961-03-21
Abstract
No abstract record available.
Inventors
- 👤 Fred G Julyan
- 👤 William M Schweickart
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 17:46
CPC Classifications
F; F23; F23J; F23J1/00; F23J2700/00; F23J2700/001
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) | 1946-06-07 | 1946-12-07 | 1947-06-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1950-06-07 | 1950-12-07 | 1951-06-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1954-06-07 | 1954-12-07 | 1955-06-08 | $7700.00 | Window Closed / Lapsed |