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Patent US2666403A successfully refreshed from Google Patents.
US2666403A
Expired / Lapsed
US
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Corncob burner
Assignee: Individual
•
Filing: 1951-07-13
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Granted: 1954-01-19
•
Expires: 1971-07-13
Abstract
No abstract record available.
Inventors
- 👤 Walter C Polk
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 20:01
CPC Classifications
F; F23; F23G; F23G5/00; F23G5/24; F23G7/00; F23G7/10
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1303108A
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US711026A
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US880442A
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US1019837A
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US1462720A
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US1496900A
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US1494039A
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US1520539A
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US1553008A
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US1978602A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-01-18 | 1957-07-20 | 1958-01-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-01-18 | 1961-07-20 | 1962-01-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-01-18 | 1965-07-20 | 1966-01-19 | $7700.00 | Window Closed / Lapsed |