US2728656A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of preparing lead alloys
Assignee: Ethyl Corp
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Filing: 1952-02-29
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Granted: 1955-12-27
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Expires: 1972-02-29
Abstract
No abstract record available.
Inventors
- 👤 Clarence M Neher
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 16:04
CPC Classifications
C; C22; C22C; C22C11/00; C22C11/02; Y; Y10; Y10T; Y10T137/00; Y10T137/0318; Y10T137/0324; Y10T137/0329; Y10T137/034
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
173 words
A PROCESS FOR CONTINUOUSLY MANUFACTURING A MOLTEN ALLOY OF LEAD AND AT LEAST ONE ALKALI METAL COMPRISING PROVIDING A STREAM COMPRISING MOLTEN LEAD, AND A STREAM OF MOLTEN ALKALI METAL, THE FLOW OF ONE OF SAID STREAMS BEING CONTROLLED BY MEANS RESPONSIVE TO A VOLTAGE DIFFERENCE, COMBINING THE LEAD AND ALKALI METAL STREAMS AS AN ADDITIONAL COMBINED STREAM AND MIXING THE LEAD AND THE ALKALI METALS IN THE COMBINED STREAM AND CONCURRENTLY WITH THE MIXING REMOVING THE HEAT GENERATED AND COOLING TO A CONSTANT TEMPERATURE, ABOVE THE MELTING POINT OF THE ALLOY DESIRED, THEN PASSING SAID COMBINED STREAM PAST A REFERENCE METAL SPECIMEN, COMPRISING AN ALKALI METAL CORRESPONDING TO A COMPONENT OF THE ALLOY, THE SPECIMEN BEING ISOLATED FROM THE PERIPHERY OF THE COMBINED STREAM, AND SEPARATED FROM THE COMBINED STREAM BY A MEMBRANE PERMEABLE TO IONS OF THE REFERENCE METAL, WHEREBY A VOLTAGE DIFFERENCE IS DEVELOPED BETWEEN THE COMBINED ALLOY STREAM AND THE REFERENCE METAL, AND TRANSMITTING THE VOLTAGE DIFFERENCE TO THE MEANS FOR CONTROLLING THE FLOW OF ONE OF SAID STREAMS.
Claim 2
Dependent Claim
173 words
A PROCESS FOR CONTINUOUSLY MANUFACTURING A MOLTEN ALLOY OF LEAD AND AT LEAST ONE ALKALI METAL COMPRISING PROVIDING A STREAM COMPRISING MOLTEN LEAD, AND A STREAM OF MOLTEN ALKALI METAL, THE FLOW OF ONE OF SAID STREAMS BEING CONTROLLED BY MEANS RESPONSIVE TO A VOLTAGE DIFFERENCE, COMBINING THE LEAD AND ALKALI METAL STREAMS AS AN ADDITIONAL COMBINED STREAM AND MIXING THE LEAD AND THE ALKALI METALS IN THE COMBINED STREAM AND CONCURRENTLY WITH THE MIXING REMOVING THE HEAT GENERATED AND COOLING TO A CONSTANT TEMPERATURE, ABOVE THE MELTING POINT OF THE ALLOY DESIRED, THEN PASSING SAID COMBINED STREAM PAST A REFERENCE METAL SPECIMEN, COMPRISING AN ALKALI METAL CORRESPONDING TO A COMPONENT OF THE ALLOY, THE SPECIMEN BEING ISOLATED FROM THE PERIPHERY OF THE COMBINED STREAM, AND SEPARATED FROM THE COMBINED STREAM BY A MEMBRANE PERMEABLE TO IONS OF THE REFERENCE METAL, WHEREBY A VOLTAGE DIFFERENCE IS DEVELOPED BETWEEN THE COMBINED ALLOY STREAM AND THE REFERENCE METAL, AND TRANSMITTING THE VOLTAGE DIFFERENCE TO THE MEANS FOR CONTROLLING THE FLOW OF ONE OF SAID STREAMS.
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) | 1958-12-26 | 1959-06-27 | 1959-12-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-12-26 | 1963-06-27 | 1963-12-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-12-26 | 1967-06-27 | 1967-12-27 | $7700.00 | Window Closed / Lapsed |