US3798140A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for producing aluminum and silicon from aluminum silicon alloys
Assignee: United States Department of the Interior
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Filing: 1973-02-01
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Granted: 1974-03-19
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Expires: 1993-02-01
Abstract
Abstract NACL-KCL-ALCL3 OR NACL-KCL-ALF3. MOLTEN ALUMINUM IS PRODUCED AT THE CATHODE, ANODE RESIDUE IS ACID LEACHED TO PRODUCE METALLURGICAL GRADE SILICON. ALUMINUM-SILICON ALLOY PRODUCED, FOR EXAMPLE, BY SMELTING ALUMINUM-SILICATE ORE, IS EMPLOYED AS THE ANODE IN ELECTROLYSIS IN A MOLTEN SALT ELECTROLYTE OF
Inventors
- 👤 T Sullivan
- 👤 E Singleton
- 👤 M Johnson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 11:02
CPC Classifications
C; C25; C25C; C25C3/00; C25C3/06; C25C3/24; C01; C01B; C01B33/00; C01B33/02
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) | 1977-03-18 | 1977-09-17 | 1978-03-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-03-18 | 1981-09-17 | 1982-03-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-03-18 | 1985-09-17 | 1986-03-19 | $7700.00 | Window Closed / Lapsed |