US3249425A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for freeze-refining a metal
Assignee: JOSEPH R MARES
•
Filing: 1964-08-17
•
Granted: 1966-05-03
•
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 16:56
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.
References Cited (Backward Citations)
US199475A
Cited
US2087347A
Cited
US2242350A
Cited
US2574764A
Cited
US2739088A
Cited
US2773923A
Cited
US2822308A
Cited
US2870006A
Cited
US2848321A
Cited
US2912321A
Cited
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 |