US2479435A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of reducing iron group metal oxides
Assignee: Standard Oil Development Co
•
Filing: 1946-05-14
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Granted: 1949-08-16
•
Expires: 1966-05-14
Abstract
No abstract record available.
Inventors
- 👤 Hans G Vesterdal
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 19:53
CPC Classifications
B; B01; B01J; B01J23/00; B01J23/70; B01J23/74; C; C07; C07C; C07C1/00; C07C1/02; C07C1/04; C07C1/0425; C07C1/0445; C07C2523/00; C07C2523/70; C07C2523/74; C07C2523/745
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1318431A
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US1588420A
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AT131235B
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DE534622C
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US2112643A
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US2287663A
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US2399984A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-08-15 | 1953-02-14 | 1953-08-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-08-15 | 1957-02-14 | 1957-08-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-08-15 | 1961-02-14 | 1961-08-16 | $7700.00 | Window Closed / Lapsed |