US3681050A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Agent for desulfurizing molten pig iron
Assignee: Aikoh Co Ltd
•
Filing: 1970-08-27
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Granted: 1972-08-01
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Expires: 1990-08-27
Abstract
Abstract THIS INVENTION RELATES TO A DESULFURIZING AGENT FOR MOLTEN IRON CHARACTERIZED BY PLACING INTO A CONTAINER A MOLDING OF A HOMOGENEOUS COMPOSITION WHICH CONTAINS 53 TO 58% BY WEIGHT OF SODIUM CARBONATE (SODA ASH), 5 TO 18% BY WEIGHT OF PORTLAND CEMENT, 3 TO 10% BY WEIGHT OF SODIUM HYDROXIDE AND 0 TO 4% BY WEIGHT OF WATER GLASS AS SOLID COMPONENT AND A PROPER QUANTITY OF WATER. D R A W I N G
Inventors
- 👤 Kazufusa Ueki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 19:14
CPC Classifications
C; C21; C21C; C21C1/00; C21C1/02; C21C1/025; Y; Y10; Y10T; Y10T428/00; Y10T428/12; Y10T428/12222
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) | 1975-08-01 | 1976-01-31 | 1976-08-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-01 | 1980-01-31 | 1980-08-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-01 | 1984-01-31 | 1984-08-01 | $7700.00 | Window Closed / Lapsed |