Patent US3004847A successfully refreshed from Google Patents.
US3004847A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Refining of crude iron
Assignee: BOT Brassert Oxygen Technik AG
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Filing: 1958-12-22
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Granted: 1961-10-17
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Expires: 1978-12-22
Abstract
No abstract record available.
Inventors
- 👤 Lambert Louis Jean Rene
- 👤 Messin Georges Marie
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 10:48
CPC Classifications
C; C21; C21C; C21C5/00; C21C5/28; C21C5/30; C21C5/32
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1137681A
Cited
GB492740A
Cited
GB493610A
Cited
US2440564A
Cited
US2668759A
Cited
US2804385A
Cited
US2815275A
Cited
US2853377A
Cited
US2893861A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-10-16 | 1965-04-17 | 1965-10-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-10-16 | 1969-04-17 | 1969-10-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-10-16 | 1973-04-17 | 1973-10-17 | $7700.00 | Window Closed / Lapsed |