Patent US2426568A successfully refreshed from Google Patents.
US2426568A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Furnace door
Assignee: Individual
•
Filing: 1944-03-07
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Granted: 1947-08-26
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Expires: 1964-03-07
Abstract
No abstract record available.
Inventors
- 👤 Sontz Arthur
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 18:03
CPC Classifications
F; F27; F27D; F27D1/00; F27D1/18; F27D1/1858
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1048471A
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US1013177A
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US1376617A
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US1569197A
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US1972593A
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US1672524A
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US2155165A
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US2216813A
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US2125192A
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US2125193A
Cited
US2197696A
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US2325945A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-08-25 | 1951-02-24 | 1951-08-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-08-25 | 1955-02-24 | 1955-08-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-08-25 | 1959-02-24 | 1959-08-26 | $7700.00 | Window Closed / Lapsed |