Patent US2438925A successfully refreshed from Google Patents.
US2579369A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Addition alloy for treatment of steel
Assignee: Vanadium Corp of America
•
Filing: 1948-09-13
•
Granted: 1951-12-18
•
Expires: 1968-09-13
Abstract
No abstract record available.
Inventors
- 👤 Charles N Dawe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 19:55
CPC Classifications
C; C21; C21C; C21C7/00; C21C7/0006; C22; C22C; C22C28/00
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
88 words
AN ALLOY FOR ADDITION TO MOLTEN STEEL AND EFFECTIVE IN INCREASING THE HARDENABILITY AND REFINING THE GRAIN SIZE OF THE STEEL COMPOSED OF ABOUT 35 TO 65% ALUMINUM, ABOUT 0.02 TO 5% BORON, ABOUT 5 TO 35% OF AT LEAST ONE OF THE ELEMENTS SELECTED FROM THE GROUP CONSISTING OF TITANIUM AND ZIRCONIUM, ABOUT 2 TO 35% VANADIUM, AND UP TO ABOUT 30% OF AN ELEMENT SELECTED FROM THE GROUP CONSISTING OF SILICON AND MANGANESE, THE REMAINDER BEING IRON AND INCIDENTAL IMPURITIES, SAID IRON BEING AT LEAST 15%.
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) | 1954-12-17 | 1955-06-18 | 1955-12-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-12-17 | 1959-06-18 | 1959-12-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-12-17 | 1963-06-18 | 1963-12-18 | $7700.00 | Window Closed / Lapsed |