US3131058A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of manufacturing fine grained and clean steels
Assignee: RES INST IRON STEEL
•
Filing: 1962-03-05
•
Granted: 1964-04-28
•
Expires: 1982-03-05
Abstract
No abstract record available.
Inventors
- 👤 Ototani Tohei
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 15:04
CPC Classifications
C; C21; C21C; C21C7/00; C21C7/0006
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
151 words
A PROCESS FOR PRODUCING FINE GRAINED AND CLEAN STEELS FROM STEELS HAVING THE COMPOSITION OF CARBON STEELS WITH LESS THAN 0.85% CARBON AND HAVING UPON SOLIDIFICATION EUTECTOID AND HYPOEUTECTOID STRUCTURES AND ALLOY STEELS CONTAINING UP TO 2% CARBON, THE STEPS WHICH COMPRISE ADDING TO A MELT OF THE STEELS WHICH CONTAIN AFTER PRELIMINARY DEOXIDATION WITH MANGANESE AND SILICON 0.0010.3% OF THE ELEMENTS SELECTED FROM THE GROUP CONSISTING OF TI, V, ZR, AND NB TOGETHER WITH N IS AN AMOUNT JOF 0.001 TO 0.3% AND THEN ADDING AN ALLOY CONSISTING ESSENTIALLY OF 22%-80% MN, J0.2 TO 35% CA, 0.1 TO 60% AL, LESS THAN 10% FE AND THE BALANCE SUBSTANTIALLY SI, WHEREIN SI IS WITHIN THE RANGE OF 2 TO 1/4 OF MN, SAID ALLOY BEING IN AN AMOUNT SUFFICINET TO LEAVE 0.001-0.05 CA IN THE STEEL, THEREBY FORMING A NITRIDE OF SAID GROUP AND PRODUCING SAID CLEAN AND FINE GRAINED STEEL.
Claim 2
Dependent Claim
151 words
A PROCESS FOR PRODUCING FINE GRAINED AND CLEAN STEELS FROM STEELS HAVING THE COMPOSITION OF CARBON STEELS WITH LESS THAN 0.85% CARBON AND HAVING UPON SOLIDIFICATION EUTECTOID AND HYPOEUTECTOID STRUCTURES AND ALLOY STEELS CONTAINING UP TO 2% CARBON, THE STEPS WHICH COMPRISE ADDING TO A MELT OF THE STEELS WHICH CONTAIN AFTER PRELIMINARY DEOXIDATION WITH MANGANESE AND SILICON 0.0010.3% OF THE ELEMENTS SELECTED FROM THE GROUP CONSISTING OF TI, V, ZR, AND NB TOGETHER WITH N IS AN AMOUNT JOF 0.001 TO 0.3% AND THEN ADDING AN ALLOY CONSISTING ESSENTIALLY OF 22%-80% MN, J0.2 TO 35% CA, 0.1 TO 60% AL, LESS THAN 10% FE AND THE BALANCE SUBSTANTIALLY SI, WHEREIN SI IS WITHIN THE RANGE OF 2 TO 1/4 OF MN, SAID ALLOY BEING IN AN AMOUNT SUFFICINET TO LEAVE 0.001-0.05 CA IN THE STEEL, THEREBY FORMING A NITRIDE OF SAID GROUP AND PRODUCING SAID CLEAN AND FINE GRAINED STEEL.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-04-28 | 1967-10-28 | 1968-04-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-04-28 | 1971-10-28 | 1972-04-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-04-28 | 1975-10-28 | 1976-04-28 | $7700.00 | Window Closed / Lapsed |