US3684539A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of adding oxygen containing metallic compounds to a molten metallurgical slag
Assignee: Individual
•
Filing: 1969-12-10
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Granted: 1972-08-15
•
Expires: 1989-12-10
Abstract
Abstract A METHOD OF ADDING COMPOUNDS CONTAINING METALS AND OXYGEN TO MOLTEN METALLURGICAL SLAG WHEREIN THE COMPOUNDS CARRIED IN COMBUSTION OXYGEN ARE INTRODUCED BENEATH THE SURFACE OF A BODY OF MOLTEN SLAG AND FUEL IS SEPARATELY INTRODUCED INTO THE SLAG WITH THE FUEL AND OXYGEN COMPLETELY BURNING BENEATH THE SLAG TO MAINTAIN IT MOLTEN.
Inventors
- 👤 George A Bartholomew
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 13:25
CPC Classifications
C; C03; C03C; C03C1/00; C03C1/002; C04; C04B; C04B5/00; C04B5/06; C21; C21B; C21B3/00; C21B3/04; C21B3/06; C21B2400/00; C21B2400/02; Y; Y02; Y02W; Y02W30/00; Y02W30/50; Y10; Y10S; Y10S75/00; Y10S75/958
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) | 1975-08-15 | 1976-02-14 | 1976-08-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-15 | 1980-02-14 | 1980-08-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-15 | 1984-02-14 | 1984-08-15 | $7700.00 | Window Closed / Lapsed |