Patent US3081367A successfully refreshed from Google Patents.
Patent US3078159A successfully refreshed from Google Patents.
US3078159A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Subhalide distillation of aluminum
Assignee: Alcan Research and Development Ltd
•
Filing: 1959-11-12
•
Granted: 1963-02-19
•
Expires: 1979-11-12
Abstract
No abstract record available.
Inventors
- 👤 Ethan A Hollingshead
- 👤 Norman W F Phillips
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 17:56
CPC Classifications
C; C22; C22B; C22B21/00; C22B21/0038; C22B21/0046; C01; C01F; C01F7/00; C01F7/48; C01F7/56; C01F7/62
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
156 words
IN PROCEDURE FOR PURIFICATION OF ALUMINUM BY SUBHALIDE DISTILLATION WHEREIN A VAPOR IS PRODUCED CONTAINING ALUMINUM MONOHALIDE AND A DISSOCIATING HALIDE OF AN IMPURITY METAL WHICH REACTIVELY CONDENSES FASTER THAN ALUMINUM UPON FALL OF TEMPERATURE, THE PROCESS COMPRISING SUBJECTING SAID PRODUCED VAPOR TO A RECTIFYING SYSTEM INCLUDING A COLUMN AND A DECOMPOSER FOR YIELDING PURIFIED ALUMINUM IN THE DECOMPOSER AND IMPURITY-ENRICHED ALUMINUM-CONTAINING MOLTEN METAL IN THE COLUMN, SAID PROCESS INCLUDING ADVANCING THE VAPOR AND MOLTEN ALUMINUM METAL IN COUNTERCURRENT RELATION IN THE COLUMN, CONTINUING THE ADVANCE OF SAID MOLTEN ALUMINUM METAL TO A REACTION ZONE ASSOCIATED WITH AN END OF THE COLUMN, SAID MOLTEN ALUMINUM METAL AS IT ADVANCES THROUGH THE COLUMN BECOMING ENRICHED WITH IMPURITY METAL REACTIVELY CONDENSED FROM THE AFORESAID VAPOR WHICH IS ADVANCED THROUGH THE COLUMN, SO THAT SAID MOLTEN ALUMINUM METAL WHILE TRAVELING TO SAID END OF THE COLUMN BECOMES THE AFORESAID IMPURITY-ENRICHED ALUMINUM-CONTAINING MOLTEN METAL, REACTING SOME ALUMINUM OF SAID IMPURITY-ENRICHED
Claim 2
Dependent Claim
156 words
IN PROCEDURE FOR PURIFICATION OF ALUMINUM BY SUBHALIDE DISTILLATION WHEREIN A VAPOR IS PRODUCED CONTAINING ALUMINUM MONOHALIDE AND A DISSOCIATING HALIDE OF AN IMPURITY METAL WHICH REACTIVELY CONDENSES FASTER THAN ALUMINUM UPON FALL OF TEMPERATURE, THE PROCESS COMPRISING SUBJECTING SAID PRODUCED VAPOR TO A RECTIFYING SYSTEM INCLUDING A COLUMN AND A DECOMPOSER FOR YIELDING PURIFIED ALUMINUM IN THE DECOMPOSER AND IMPURITY-ENRICHED ALUMINUM-CONTAINING MOLTEN METAL IN THE COLUMN, SAID PROCESS INCLUDING ADVANCING THE VAPOR AND MOLTEN ALUMINUM METAL IN COUNTERCURRENT RELATION IN THE COLUMN, CONTINUING THE ADVANCE OF SAID MOLTEN ALUMINUM METAL TO A REACTION ZONE ASSOCIATED WITH AN END OF THE COLUMN, SAID MOLTEN ALUMINUM METAL AS IT ADVANCES THROUGH THE COLUMN BECOMING ENRICHED WITH IMPURITY METAL REACTIVELY CONDENSED FROM THE AFORESAID VAPOR WHICH IS ADVANCED THROUGH THE COLUMN, SO THAT SAID MOLTEN ALUMINUM METAL WHILE TRAVELING TO SAID END OF THE COLUMN BECOMES THE AFORESAID IMPURITY-ENRICHED ALUMINUM-CONTAINING MOLTEN METAL, REACTING SOME ALUMINUM OF SAID IMPURITY-ENRICHED
References Cited (Backward Citations)
US1980263A
Cited
US1953936A
Cited
US1994358A
Cited
US2470305A
Cited
US2625472A
Cited
US2723911A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-02-18 | 1966-08-20 | 1967-02-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-02-18 | 1970-08-20 | 1971-02-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-02-18 | 1974-08-20 | 1975-02-19 | $7700.00 | Window Closed / Lapsed |