Patent US2591259A successfully refreshed from Google Patents.
US2591259A
Expired / Lapsed
US
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Billet heating furnace
Assignee: Selas Corp of America
•
Filing: 1946-09-26
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Granted: 1952-04-01
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Expires: 1966-09-26
Abstract
No abstract record available.
Inventors
- 👤 Frederic O Hess
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 17:53
CPC Classifications
F; F27; F27B; F27B9/00; F27B9/14; F27B9/142; C; C21; C21D; C21D9/00; C21D9/005
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US712386A
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US699132A
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US957998A
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US1690428A
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US1755755A
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US2022649A
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US2214421A
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US2415376A
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US2451053A
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US2547755A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-04-01 | 1955-10-01 | 1956-04-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-04-01 | 1959-10-01 | 1960-04-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-04-01 | 1963-10-01 | 1964-04-01 | $7700.00 | Window Closed / Lapsed |