US3061296A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Blast air preheating system for cupola furnaces and the like
Assignee: Centre Technique Des Industries De La Fonderie
•
Filing: 1959-06-26
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Granted: 1962-10-30
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Expires: 1979-06-26
Abstract
No abstract record available.
Inventors
- 👤 Ulmer Georges
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 03:40
CPC Classifications
F; F27; F27B; F27B1/00; F27B1/10; F27B1/22; C; C21; C21B; C21B9/00; C21B9/10; C21B9/12
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1090574A
Cited
US1376479A
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US1704029A
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US1694376A
Cited
US1773705A
Cited
US1740886A
Cited
US2817508A
Cited
GB768365A
Cited
FR1129054A
Cited
US2865734A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-10-29 | 1966-04-30 | 1966-10-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-10-29 | 1970-04-30 | 1970-10-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-10-29 | 1974-04-30 | 1974-10-30 | $7700.00 | Window Closed / Lapsed |