US2898101A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat treating furnace having double-ended chain conveyor
Assignee: Surface Combustion Corp
•
Filing: 1956-12-05
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Granted: 1959-08-04
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Expires: 1976-12-05
Abstract
No abstract record available.
Inventors
- 👤 Clair T Hannum
- 👤 Henry W Schramm
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 03:34
CPC Classifications
F; F27; F27B; F27B9/00; F27B9/14; F27B9/20; F27B9/24; F27B9/243
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US912679A
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US1462511A
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US2639138A
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US2646980A
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US2615701A
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US2639047A
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US2669445A
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US2716989A
Cited
US2747855A
Cited
US2681136A
Cited
US2776134A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-08-03 | 1963-02-02 | 1963-08-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-08-03 | 1967-02-02 | 1967-08-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-08-03 | 1971-02-02 | 1971-08-04 | $7700.00 | Window Closed / Lapsed |