US2995354A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for operation of cupola furnaces
Assignee: Gesellschaft fur Huettenwerksanlagen M B H
•
Filing: 1957-09-17
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Granted: 1961-08-08
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Expires: 1977-09-17
Abstract
No abstract record available.
Inventors
- 👤 Tunder Siegfried
- 👤 Mertz Fritz Von
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 14:54
CPC Classifications
F; F27; F27B; F27B1/00; F27B1/10; F27B1/18
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2540966A
Cited
US1856897A
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US2448835A
Cited
US2625386A
Cited
US2713124A
Cited
US2814479A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-08-07 | 1965-02-06 | 1965-08-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-08-07 | 1969-02-06 | 1969-08-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-08-07 | 1973-02-06 | 1973-08-08 | $7700.00 | Window Closed / Lapsed |