US3725041A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Deoxidizing metal
Assignee: Allegheny Ludlum Corp
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Filing: 1970-09-25
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Granted: 1973-04-03
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Expires: 1990-09-25
Abstract
Abstract A METHOD OF DEOXIDIZING METAL WHILE MAINTAINING THE CARBON CONTENT OF THE METAL AT A LEVEL ABOUT EQUAL TO OR LOWER THAN THE LEVEL PRIOR TO DEOXIDIZING. IT COMPRISES THE STEPS OF INTRODUCING HYDROCARBON DEOXIDIZER AND DILUENT GAS INTO A VESSEL CONTAINING MOLTEN METAL, DETERMINING THE EFFECT OF THE HYDROCARBON DEOXIDIZER AND DILUENT GAS UPON THE CARBON CONTENT OF THE METAL AND CONTROLLING THE PROPORTION OF HYDROCARBON DEOXIDIZER TO DILUENT GAS SO THAT THE AVERAGE RATE OF CARBON LEAVING THE VESSEL IS ABOUT EQUAL TO OR GREATER THAN THE AVERAGE RATE OF CARBON BEING INTRODUCED INTO THE VESSEL.
Inventors
- 👤 S Ramachandran
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 10:51
CPC Classifications
C; C22; C22B; C22B9/00; C22B9/05; C21; C21C; C21C7/00; C21C7/04; C21C7/06; Y; Y02; Y02P; Y02P10/00; Y02P10/10; Y02P10/143
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) | 1976-04-02 | 1976-10-02 | 1977-04-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-04-02 | 1980-10-02 | 1981-04-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-04-02 | 1984-10-02 | 1985-04-03 | $7700.00 | Window Closed / Lapsed |