US2499735A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automatic cradle type stoker
Assignee: Individual
•
Filing: 1946-05-10
•
Granted: 1950-03-07
•
Expires: 1966-05-10
Abstract
No abstract record available.
Inventors
- 👤 Humphrey A Ellis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 12:16
CPC Classifications
F; F23; F23K; F23K3/00; F23K3/08
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US608712A
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US474931A
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US915034A
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US925723A
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US1168367A
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US1099682A
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US1107121A
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US1395006A
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US1475159A
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US1564229A
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US1512812A
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US1630738A
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US2276327A
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US2361736A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-03-06 | 1953-09-05 | 1954-03-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-03-06 | 1957-09-05 | 1958-03-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-03-06 | 1961-09-05 | 1962-03-07 | $7700.00 | Window Closed / Lapsed |