US3832452A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Purification of anhydrous aluminum chloride in situ in a salt melt
Assignee: Individual
•
Filing: 1973-04-10
•
Granted: 1974-08-27
•
Expires: 1993-04-10
Abstract
Abstract Purification of anhydrous aluminum chloride in an alkaline metal chloride-aluminum chloride melt can be effected in situ by the addition of solid alkali metal to the melt.
Inventors
- 👤 D Crouch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 07:29
CPC Classifications
C; C01; C01F; C01F7/00; C01F7/48; C01F7/56; C01F7/62; H; H01; H01M; H01M6/00; H01M6/30; H01M6/36; Y; Y10; Y10S; Y10S423/00; Y10S423/09; Y10S423/12
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
21 words
A process according to claim 1 wherein an excess of alkali metal is added to the alkali metal chloride-aluminum chloride melt.
Claim 2
Dependent Claim
22 words
A process according to claim 1 wherein the alkali metal added is selected from the group consisting of sodium, potassium and lithium.
Claim 3
Dependent Claim
13 words
A process according to claim 3 wherein the alkali metal added is sodium.
Claim 4
Dependent Claim
22 words
A process according to claim 2 wherein the alkali metal added is selected from the group consisting of sodium, potassium and lithium.
Claim 5
Dependent Claim
13 words
A process according to claim 5 wherein the alkali metal added is sodium.
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) | 1977-08-26 | 1978-02-25 | 1978-08-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-08-26 | 1982-02-25 | 1982-08-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-08-26 | 1986-02-25 | 1986-08-27 | $7700.00 | Window Closed / Lapsed |