US1964727A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Utilization of gaseous fuel in blast furnace operations
Assignee: American Smelting and Refining Co
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Filing: 1931-10-30
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Granted: 1934-07-03
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Expires: 1951-10-30
Abstract
No abstract record available.
Inventors
- 👤 Edward P Fleming
- 👤 Armand L Labbe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 11:37
CPC Classifications
C; C21; C21B; C21B5/00; C21B5/001; F; F27; F27B; F27B1/00; F27B1/005
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) | 1937-07-02 | 1938-01-01 | 1938-07-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1941-07-02 | 1942-01-01 | 1942-07-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1945-07-02 | 1946-01-01 | 1946-07-03 | $7700.00 | Window Closed / Lapsed |