Patent US2794631A successfully refreshed from Google Patents.
US2794631A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Combined steel producing and heat generating apparatus
Assignee: Individual
•
Filing: 1954-03-16
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Granted: 1957-06-04
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Expires: 1974-03-16
Abstract
No abstract record available.
Inventors
- 👤 Becker Ernst
- 👤 Lobbecke Ernst
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 23:39
CPC Classifications
C; C21; C21C; C21C5/00; C21C5/04; F; F27; F27B; F27B3/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US406871A
Cited
US565262A
Cited
US1941562A
Cited
US2158095A
Cited
US2131031A
Cited
US2171353A
Cited
US2167596A
Cited
US2182129A
Cited
US2417345A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-06-03 | 1960-12-03 | 1961-06-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-06-03 | 1964-12-03 | 1965-06-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-06-03 | 1968-12-03 | 1969-06-04 | $7700.00 | Window Closed / Lapsed |