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Patent US3135598A successfully refreshed from Google Patents.
US3135598A
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Rapid direct reduction method of iron oxide
Assignee: Yawata Iron and Steel Co Ltd
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Filing: 1961-04-18
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Granted: 1964-06-02
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Expires: 1981-04-18
Abstract
No abstract record available.
Inventors
- 👤 Mizushima San-Ichiro
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 09:10
CPC Classifications
C; C21; C21B; C21B13/00; C21B13/14; C21B13/146; C21B13/0033; Y; Y02; Y02P; Y02P10/00; Y02P10/10; Y02P10/134; Y02P10/143
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-06-02 | 1967-12-02 | 1968-06-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-06-02 | 1971-12-02 | 1972-06-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-06-02 | 1975-12-02 | 1976-06-02 | $7700.00 | Window Closed / Lapsed |