US2454400A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automatic stoker
Assignee: —
•
Filing: —
•
Granted: 1948-11-23
•
Expires: 1965-11-23
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 23:52
CPC Classifications
—
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US182057A
Cited
US1368701A
Cited
US1605449A
Cited
DE620704C
Cited
US836402A
Cited
US1636375A
Cited
US1570604A
Cited
US1578546A
Cited
US1886064A
Cited
US2123163A
Cited
DE697459C
Cited
US2228758A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-11-23 | 1952-05-24 | 1952-11-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-11-23 | 1956-05-24 | 1956-11-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-11-23 | 1960-05-24 | 1960-11-23 | $7700.00 | Window Closed / Lapsed |