US3462262A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the recovery of excess carbon from the product of an iron ore direct reduction
Assignee: Steel Company of Canada Ltd
•
Filing: 1965-09-08
•
Granted: 1969-08-19
•
Expires: 1985-09-08
Abstract
No abstract record available.
Inventors
- 👤 Walter Koch
- 👤 Ottmar Zugel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 17:15
CPC Classifications
C; C21; C21B; C21B13/00; C21B13/0066; C21B13/0086; C21B13/08
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2643215A
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US3042504A
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US2725985A
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US2850164A
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US2903423A
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US3045818A
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US3185563A
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US3140169A
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US3149961A
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US3147093A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-08-18 | 1973-02-17 | 1973-08-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-08-18 | 1977-02-17 | 1977-08-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-08-18 | 1981-02-17 | 1981-08-19 | $7700.00 | Window Closed / Lapsed |