US3061295A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Open hearth furnace
Assignee: United States Steel Corp
•
Filing: 1961-02-15
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Granted: 1962-10-30
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Expires: 1981-02-15
Abstract
No abstract record available.
Inventors
- 👤 Paul J Martin
- 👤 Albert H Moehl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 04:02
CPC Classifications
F; F27; F27D; F27D1/00; F27D1/0003; F27D1/0006; F27D1/0009; F27B; F27B3/00; F27B3/10; F27B3/12; F27B3/14; F27B3/22
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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 |