US2850443A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of treating alloys
Assignee: Foundry Services Ltd
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Filing: 1956-10-12
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Granted: 1958-09-02
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Expires: 1976-10-12
Abstract
No abstract record available.
Inventors
- 👤 Atterton David Valentine
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 19:11
CPC Classifications
C; C22; C22C; C22C21/00; C22C21/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
63 words
THE METHOD OF MODIFYING AN ALUMINUM-SILICON ALLOY WITH SODIUM WHICH COMPRISES THE STEPS OF FORMING A MOLTEN BATH OF ALUMINUM-SILICON ALLOY, ADDING AN ALKALINE CHLORIDE ELECTROLYTE AS A SOURCE OF SODIUM IONS, INSERTING AN ELECTRODE INTO SAID ELECTROLYTE, AND ELECTROLYZING SAID ELECTROLYTE WITH SAID ELECTRODE AS AN ANODE AND SAID MOLTEN ALLOY AND INTRODUCE SODIUM IONS INTO SAID ALLOY FOR MODIFYING THE SAME.
Claim 2
Independent Claim
63 words
THE METHOD OF MODIFYING AN ALUMINUM-SILICON ALLOY WITH SODIUM WHICH COMPRISES THE STEPS OF FORMING A MOLTEN BATH OF ALUMINUM-SILICON ALLOY, ADDING AN ALKALINE CHLORIDE ELECTROLYTE AS A SOURCE OF SODIUM IONS, INSERTING AN ELECTRODE INTO SAID ELECTROLYTE, AND ELECTROLYZING SAID ELECTROLYTE WITH SAID ELECTRODE AS AN ANODE AND SAID MOLTEN ALLOY AND INTRODUCE SODIUM IONS INTO SAID ALLOY FOR MODIFYING THE SAME.
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) | 1961-09-01 | 1962-03-03 | 1962-09-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-09-01 | 1966-03-03 | 1966-09-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-09-01 | 1970-03-03 | 1970-09-02 | $7700.00 | Window Closed / Lapsed |