US2992097A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Methods and apparatus for desulphurization of ferrous metals
Assignee: Individual
•
Filing: 1958-07-11
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Granted: 1961-07-11
•
Expires: 1978-07-11
Abstract
No abstract record available.
Inventors
- 👤 Harry R Spence
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 05:48
CPC Classifications
C; C21; C21C; C21C7/00; C21C7/04; C21C7/064
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
95 words
A METHOD OF DESULPHURIZING A MOLTEN FERROUS BATH COMPRISING THE STEPS OF DELIVERING A STREAM OF A MOLTEN MIXTURE OF CAUSTIC SODA AND AN ADJUVANT AGENT SELECTED FROM THE GROUP CONSISTING OF CALCIUM CARBIDE, MANGANESE DIOXIDE, MAGNESIUM OXIDE, CALCIUM BORIDE, RARE EARTH OXIDES, CALCIUM CYANAMIDE AND FLUORSPAR INTO THE BODY OF THE MOLTEN BATH BENEATH THE SURFACE THEREOF MAINTAINING THE BATH MOLTEN WHILE THE CAUSTIC MIXTURE DIFFUSES THROUGH THE BODY OF THE MOLTEN STEEL BATH TO REACT WITH THE SULFUR AND SEPARATING THE REMAINING MOLTEN METAL FROM THE SLAG FORMED BY THE CAUSTIC MIXTURE-SULFUR REACTION.
Claim 2
Independent Claim
95 words
A METHOD OF DESULPHURIZING A MOLTEN FERROUS BATH COMPRISING THE STEPS OF DELIVERING A STREAM OF A MOLTEN MIXTURE OF CAUSTIC SODA AND AN ADJUVANT AGENT SELECTED FROM THE GROUP CONSISTING OF CALCIUM CARBIDE, MANGANESE DIOXIDE, MAGNESIUM OXIDE, CALCIUM BORIDE, RARE EARTH OXIDES, CALCIUM CYANAMIDE AND FLUORSPAR INTO THE BODY OF THE MOLTEN BATH BENEATH THE SURFACE THEREOF MAINTAINING THE BATH MOLTEN WHILE THE CAUSTIC MIXTURE DIFFUSES THROUGH THE BODY OF THE MOLTEN STEEL BATH TO REACT WITH THE SULFUR AND SEPARATING THE REMAINING MOLTEN METAL FROM THE SLAG FORMED BY THE CAUSTIC MIXTURE-SULFUR REACTION.
References Cited (Backward Citations)
US598037A
Cited
US603330A
Cited
US754566A
Cited
FR740784A
Cited
US2750280A
Cited
US2741556A
Cited
US2866703A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-07-10 | 1965-01-09 | 1965-07-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-07-10 | 1969-01-09 | 1969-07-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-07-10 | 1973-01-09 | 1973-07-11 | $7700.00 | Window Closed / Lapsed |