US3865578A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Composition for treating steels
Assignee: Aikoh Co Ltd
•
Filing: 1973-01-16
•
Granted: 1975-02-11
•
Expires: 1993-01-16
Abstract
Abstract A composition for treating molten steel comprising 3 - 40 wt.% of lithium fluoride, 15 - 50 wt.% of sodium fluoride and 30 - 70 wt.% of calcium fluoride and having a melting point between 600* and 1,100*C.
Inventors
- 👤 Masaru Takashima
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 21:44
CPC Classifications
C; C21; C21C; C21C7/00; C21C7/04; C21C7/076; Y; Y02; Y02P; Y02P10/00; Y02P10/20
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
42 words
A COMPOSITION FOR TREATING MOLTEN STEEL CONSISTING ESSENTIALLY OF 3-40 WT. % OF LITHIUM FLUORIDE, 15-50 WT. % OF SODIUM FLUORIDE, 30-70 WT. % OF CALCIUM FLUORIDE AND 1-3 WT. % OF K2TIF6, AND HAVING A MELTING POINT BETWEEN 600* AND 1,100*C.
Claim 2
Dependent Claim
42 words
A COMPOSITION FOR TREATING MOLTEN STEEL CONSISTING ESSENTIALLY OF 3-40 WT. % OF LITHIUM FLUORIDE, 15-50 WT. % OF SODIUM FLUORIDE, 30-70 WT. % OF CALCIUM FLUORIDE AND 1-3 WT. % OF K2TIF6, AND HAVING A MELTING POINT BETWEEN 600* AND 1,100*C.
Claim 3
Dependent Claim
47 words
A composition for treating molten steel consisting essentially of 3-40 wt. % of lithium fluoride, 15-50 wt. % of sodium fluoride, 30-70 wt. % of calcium fluoride, 1-3 wt. % of K2TiF6 and 1-3 wt. % of CeF3, and having a melting point between 600* and 1,100*C.
Claim 4
Dependent Claim
47 words
A composition for treating molten steel consisting essentially of 3-40 wt. % of lithium fluoride, 15-50 wt. % of sodium fluoride, 30-70 wt. % of calcium fluoride, 1-3 wt. % of K2TiF6 and 1-3 wt. % of CeF3, and having a melting point between 600* and 1,100*C.
Claim 5
Dependent Claim
14 words
A composition according to claim 1 which has a particle size under 40 mesh.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-02-10 | 1978-08-12 | 1979-02-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-02-10 | 1982-08-12 | 1983-02-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-02-10 | 1986-08-12 | 1987-02-11 | $7700.00 | Window Closed / Lapsed |