US2598474A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Furnace with sectional radiant tube
Assignee: Surface Combustion Corp
•
Filing: 1949-06-11
•
Granted: 1952-05-27
•
Expires: 1969-06-11
Abstract
No abstract record available.
Inventors
- 👤 Ernest W Weaver
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 13:29
CPC Classifications
F; F23; F23C; F23C3/00; F23C3/002
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1689551A
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US1739929A
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US1888804A
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US2105533A
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US2091980A
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US2146410A
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US2093381A
Cited
US2262530A
Cited
US2220582A
Cited
GB564523A
Cited
US2472497A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-05-27 | 1955-11-26 | 1956-05-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-05-27 | 1959-11-26 | 1960-05-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-05-27 | 1963-11-26 | 1964-05-27 | $7700.00 | Window Closed / Lapsed |