Patent US2682867A successfully refreshed from Google Patents.
US2682867A
Expired / Lapsed
US
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Floor furnace with tubular heating element
Assignee: Carrier Corp
•
Filing: 1950-09-11
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Granted: 1954-07-06
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Expires: 1970-09-11
Abstract
No abstract record available.
Inventors
- 👤 William G Cartter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 09:45
CPC Classifications
F; F24; F24H; F24H3/00; F24H3/006
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US931422A
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US1334005A
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US1451609A
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US1566977A
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US1591889A
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US1725988A
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US1991704A
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US2289759A
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US2410881A
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US2514372A
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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) | 1957-07-05 | 1958-01-04 | 1958-07-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-07-05 | 1962-01-04 | 1962-07-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-07-05 | 1966-01-04 | 1966-07-06 | $7700.00 | Window Closed / Lapsed |