US3795505A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of deoxidated,depurated,killed and refined steels using aluminum-lithium alloys
Assignee: Individual
•
Filing: 1971-10-18
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Granted: 1974-03-05
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Expires: 1991-10-18
Abstract
Abstract THE INVENTION RELATES TO THE USE OF ALLOYS CONSISTING ESSENTIALLY OF ALUMINUM-LITHIUM FOR THE PURPOSE OR DEOXIDIZING, DEPURATING, KILLING AND REFINING ANY KIND OR CARBON- OR ALLOY-STEEL. THE ALLOYS USED IN THE PROCESS OF THE INVENTION CONTAIN FROM 50 TO 99.7% OF ALUMINUM AND FROM 0.3 TO 8% OF LITHIUM: THEY MAY ALSO SUITABLY CONTAIN AT LEAST ONE ELEMENT SELCTED FROM THE GROUP CONSISTING FO RARE EARTHS (TR), CA, BA, FE AND B, IN PERCENTAGE RANGES AS FOLLOWS: FE 0.5-20%; TR 0.5-13%; CA 0.2-8%; BA 0.2-2%.
Inventors
- 👤 D Corradini
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 18:03
CPC Classifications
C; C21; C21C; C21C7/00; C21C7/04; C21C7/06; C22; C22C; C22C21/00
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) | 1977-03-04 | 1977-09-03 | 1978-03-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-03-04 | 1981-09-03 | 1982-03-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-03-04 | 1985-09-03 | 1986-03-05 | $7700.00 | Window Closed / Lapsed |