Patent US2546340A successfully refreshed from Google Patents.
US2546340A
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Process for producing low-carbon chromium steels
Assignee: Union Carbide Corp
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Filing: 1949-11-14
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Granted: 1951-03-27
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Expires: 1969-11-14
Abstract
No abstract record available.
Inventors
- 👤 Hilty Donald Cleve
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 17:15
CPC Classifications
C; C21; C21C; C21C7/00; C21C7/04; C21C7/068; C21C7/0685
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
113 words
IN THE MANUFACTURE OF CHROMIUM-CONTAINING STEEL CONTAINING LESS THAN 0.20% CARBON INCLUDING THE STEPS OF PREPARING AND MELTING A CHARGE OF MATERIALS TO FORM A BATH OF MOLTEN STEEL CONTAINING CARBON AND CHROMIUM, OXIDIZING SUCH BATH TO REMOVE CARBON, REDUCING A PORTION OF THE METAL OXIDES FORMED DURING SAID OXIDIZING STEP, DEOXIDIZING SAID BATH, AND TAPPING, THE IMPROVEMENT WHICH COMPRISES ADDING CARBON TO SAID CHARGE PRIOR TO THE START OF DIRECT OXIDATION OF THE BATH IN AN AMOUNT IN EXCESS OF THAT WHICH WOULD BE IN EQUILIBRIUM WITH THE CHROMIUM CONTENT OF THE CHARGE AT THE TEMPERATURES PREVAILING DURING THE MELT-DOWN PERIOD THEREBY DECREASING THE AMOUNT OF CHROMIUM OXIDIZED IN SAID OXIDIZING STEP.
Claim 2
Dependent Claim
113 words
IN THE MANUFACTURE OF CHROMIUM-CONTAINING STEEL CONTAINING LESS THAN 0.20% CARBON INCLUDING THE STEPS OF PREPARING AND MELTING A CHARGE OF MATERIALS TO FORM A BATH OF MOLTEN STEEL CONTAINING CARBON AND CHROMIUM, OXIDIZING SUCH BATH TO REMOVE CARBON, REDUCING A PORTION OF THE METAL OXIDES FORMED DURING SAID OXIDIZING STEP, DEOXIDIZING SAID BATH, AND TAPPING, THE IMPROVEMENT WHICH COMPRISES ADDING CARBON TO SAID CHARGE PRIOR TO THE START OF DIRECT OXIDATION OF THE BATH IN AN AMOUNT IN EXCESS OF THAT WHICH WOULD BE IN EQUILIBRIUM WITH THE CHROMIUM CONTENT OF THE CHARGE AT THE TEMPERATURES PREVAILING DURING THE MELT-DOWN PERIOD THEREBY DECREASING THE AMOUNT OF CHROMIUM OXIDIZED IN SAID OXIDIZING STEP.
References Cited (Backward Citations)
US1410749A
Cited
US1641326A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-03-26 | 1954-09-25 | 1955-03-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-03-26 | 1958-09-25 | 1959-03-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-03-26 | 1962-09-25 | 1963-03-27 | $7700.00 | Window Closed / Lapsed |