Patent US3249425A successfully refreshed from Google Patents.
US3249425A
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Process for freeze-refining a metal
Assignee: JOSEPH R MARES
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Filing: 1964-08-17
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Granted: 1966-05-03
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Expires: 1984-08-17
Abstract
No abstract record available.
Inventors
- 👤 Richard O Aamot
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 17:17
CPC Classifications
C; C22; C22B; C22B21/00; C22B21/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
124 words
IN A PROCESS FOR THE FREEZE-REFINING OF MOLTEN ALUMINUM CONFINED WITHIN A PORTION OF A ROTATING CYLINDRICAL RETORT TO EFFECT SEPARATION AND RECOVERY OF: (1) A PURIFIED SOLID ALUMINUM PRODUCT BY THE INCREMENTAL CRYSTALLINE DEPOSITION THEREOF THE RETORT WALL, AND (2) A LESSPURE RESIDUAL LIQUID PHASE, THE IMPROVEMENTS THAT COMPRISE MAINTAINING SAID MOLTEN LIQUID PHASE SUBSTANTIALLY FREE OF SOLID CRYSTALLINE GROWTH, MAINTAINING CRYSTALLIZATION TEMPERATURES AT THE SOLID-LIQUID INTERFACE, AND MAINTAINING THAT PROTION OF THE RETORT WALL OUT OF CONTACT WITH SAID LIQUID PHASE AT A LOWER TEMPERATURE FAVORING THE BUILD-UP AND DEPOSITION THEREON OF SAID CRYSTALLINE SOLID PHASE BY HEATING SAID MOLTEN ALUMINUM BY THE APPLICATION OF CONTROLLED QUANTIES OF THERMAL ENERGY TO A SELECTED PORTION ONLY OF THE RETORT WALL IN CONTACT THEREWITH.
Claim 2
Dependent Claim
124 words
IN A PROCESS FOR THE FREEZE-REFINING OF MOLTEN ALUMINUM CONFINED WITHIN A PORTION OF A ROTATING CYLINDRICAL RETORT TO EFFECT SEPARATION AND RECOVERY OF: (1) A PURIFIED SOLID ALUMINUM PRODUCT BY THE INCREMENTAL CRYSTALLINE DEPOSITION THEREOF THE RETORT WALL, AND (2) A LESSPURE RESIDUAL LIQUID PHASE, THE IMPROVEMENTS THAT COMPRISE MAINTAINING SAID MOLTEN LIQUID PHASE SUBSTANTIALLY FREE OF SOLID CRYSTALLINE GROWTH, MAINTAINING CRYSTALLIZATION TEMPERATURES AT THE SOLID-LIQUID INTERFACE, AND MAINTAINING THAT PROTION OF THE RETORT WALL OUT OF CONTACT WITH SAID LIQUID PHASE AT A LOWER TEMPERATURE FAVORING THE BUILD-UP AND DEPOSITION THEREON OF SAID CRYSTALLINE SOLID PHASE BY HEATING SAID MOLTEN ALUMINUM BY THE APPLICATION OF CONTROLLED QUANTIES OF THERMAL ENERGY TO A SELECTED PORTION ONLY OF THE RETORT WALL IN CONTACT THEREWITH.
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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) | 1969-05-02 | 1969-11-01 | 1970-05-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-05-02 | 1973-11-01 | 1974-05-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-05-02 | 1977-11-01 | 1978-05-03 | $7700.00 | Window Closed / Lapsed |