Patent US2625140A successfully refreshed from Google Patents.
US2625140A
Expired / Lapsed
US
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Furnace construction
Assignee: Individual
•
Filing: 1949-09-14
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Granted: 1953-01-13
•
Expires: 1969-09-14
Abstract
No abstract record available.
Inventors
- 👤 Horace M Weir
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 20:20
CPC Classifications
F; F22; F22B; F22B21/00; F22B21/02; F22B21/04; F22B21/06; F22B21/065
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2114269A
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US2129900A
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US2084307A
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US2211903A
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US2171941A
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US2294254A
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US2276529A
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US2340289A
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US2333077A
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US2355866A
Cited
US2415726A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-01-13 | 1956-07-14 | 1957-01-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-01-13 | 1960-07-14 | 1961-01-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-01-13 | 1964-07-14 | 1965-01-13 | $7700.00 | Window Closed / Lapsed |