US2487959A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Directional heat fluid fuel burner
Assignee: Individual
•
Filing: 1943-11-08
•
Granted: 1949-11-15
•
Expires: 1963-11-08
Abstract
No abstract record available.
Inventors
- 👤 John S Zink
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 17:06
CPC Classifications
F; F23; F23D; F23D14/00; F23D14/02; F23D14/04; F23D17/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1678086A
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US1397977A
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US1691169A
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US1513260A
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US1643788A
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US1715051A
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US1791565A
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US1801426A
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US1883541A
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US1991894A
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US2210228A
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US2196282A
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US2344936A
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US2362108A
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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) | 1952-11-14 | 1953-05-16 | 1953-11-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-11-14 | 1957-05-16 | 1957-11-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-11-14 | 1961-05-16 | 1961-11-15 | $7700.00 | Window Closed / Lapsed |