Patent US2814558A successfully refreshed from Google Patents.
US2814558A
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US
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Method of reducing iron ores containing titanium
Assignee: Individual
•
Filing: 1953-06-25
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Granted: 1957-11-26
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Expires: 1973-06-25
Abstract
No abstract record available.
Inventors
- 👤 Roy A Halversen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 04:06
CPC Classifications
C; C21; C21B; C21B5/00; C21B5/02; C21B5/023
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2159977A
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GB493731A
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US2238673A
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US2440564A
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US2205896A
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US2366177A
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US2417101A
Cited
US2453050A
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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) | 1960-11-25 | 1961-05-27 | 1961-11-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-11-25 | 1965-05-27 | 1965-11-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-11-25 | 1969-05-27 | 1969-11-26 | $7700.00 | Window Closed / Lapsed |