US2937082A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Conversion process for aluminum subhalide distillation
Assignee: Alcan Research and Development Ltd
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Filing: 1958-05-27
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Granted: 1960-05-17
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Expires: 1978-05-27
Abstract
No abstract record available.
Inventors
- 👤 Alan H Johnston
- 👤 Bohner Hans Otto
- 👤 Norman W F Phillips
- 👤 Southam Frederick William
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 14:12
CPC Classifications
C; C22; C22B; C22B21/00; C22B21/0038; C22B21/0046; C01; C01F; C01F7/00; C01F7/48; C01F7/56
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
140 words
IN A PROCESS FOR SEPARATION OF ALUMINUM BY SUBHALIDE DISTILLATION AT A PREDETERMINED ELEVATED TEMPERATURE FROM METALLIC MATERIAL THAT CONTAINS ALUMINUM AND OTHER METAL AND THAT HAS A NEGATIVE TEMPERATURE COEFFICIENT OF RESISTIVITY OVER A RANGE OF ELEVATED TEMPERATURES WHICH EXTENDS UPWARD FROM A POINT SUBSANTIALLY BELOW THE AFORESAID PREDETERMINED TEMPERATURE, THE PROCEDURE OF PREHEATING THE SAID METALLIC MATERIAL BY SUPPLYING HEAT THERETO FROM A SOURCE EXTERNAL TO THE MATERIAL ITSELF, TO BRING SAID MATERIAL TO A TEMPERATURE AT LEAST ABOUT AS HIGH, AS THE LOWER OF THE FOLLOWING TEMPERATURES: THE UPPER LIMIT OF THE AFORESAID RANGE, AND THE AFORESAID PREDETERMINED ELEVATED TEMPERATURE, AND PASSING GASEOUS HALIDE INTO CONTACT WITH SAID PREHEATED MATERIAL TO REACT THEREWITH FOR PRODUCTION OF ALUMINUM SUBHALIDE IN GASEOUS FORM, WHILE SUPPLYING HEAT ENERGY TO THE MATERIAL TO EFFECTUATE SAID REACTION BY PASSING ELECTRIC CURRENT THROUGH
Claim 2
Dependent Claim
140 words
IN A PROCESS FOR SEPARATION OF ALUMINUM BY SUBHALIDE DISTILLATION AT A PREDETERMINED ELEVATED TEMPERATURE FROM METALLIC MATERIAL THAT CONTAINS ALUMINUM AND OTHER METAL AND THAT HAS A NEGATIVE TEMPERATURE COEFFICIENT OF RESISTIVITY OVER A RANGE OF ELEVATED TEMPERATURES WHICH EXTENDS UPWARD FROM A POINT SUBSANTIALLY BELOW THE AFORESAID PREDETERMINED TEMPERATURE, THE PROCEDURE OF PREHEATING THE SAID METALLIC MATERIAL BY SUPPLYING HEAT THERETO FROM A SOURCE EXTERNAL TO THE MATERIAL ITSELF, TO BRING SAID MATERIAL TO A TEMPERATURE AT LEAST ABOUT AS HIGH, AS THE LOWER OF THE FOLLOWING TEMPERATURES: THE UPPER LIMIT OF THE AFORESAID RANGE, AND THE AFORESAID PREDETERMINED ELEVATED TEMPERATURE, AND PASSING GASEOUS HALIDE INTO CONTACT WITH SAID PREHEATED MATERIAL TO REACT THEREWITH FOR PRODUCTION OF ALUMINUM SUBHALIDE IN GASEOUS FORM, WHILE SUPPLYING HEAT ENERGY TO THE MATERIAL TO EFFECTUATE SAID REACTION BY PASSING ELECTRIC CURRENT THROUGH
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) | 1963-05-17 | 1963-11-16 | 1964-05-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-05-17 | 1967-11-16 | 1968-05-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-05-17 | 1971-11-16 | 1972-05-17 | $7700.00 | Window Closed / Lapsed |