Patent US2379423A successfully refreshed from Google Patents.
US2379423A
Expired / Lapsed
US
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Reduction of iron ores and enhancement of gases
Assignee: Individual
•
Filing: 1942-08-29
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Granted: 1945-07-03
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Expires: 1962-08-29
Abstract
No abstract record available.
Inventors
- 👤 Arthur T Cape
- 👤 Herman A Brassert
- 👤 Llewellyn H Thomas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 14:39
CPC Classifications
C; C21; C21B; C21B13/00; C21B13/0073; Y; Y02; Y02P; Y02P10/00; Y02P10/10; Y02P10/122; Y02P10/134; Y10; Y10T; Y10T29/00; Y10T29/51; Y10T29/5116; Y10T29/5118
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1948-07-02 | 1949-01-01 | 1949-07-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1952-07-02 | 1953-01-01 | 1953-07-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1956-07-02 | 1957-01-01 | 1957-07-03 | $7700.00 | Window Closed / Lapsed |