Patent US4100044A successfully refreshed from Google Patents.
US4100044A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Procedure for removing aluminum from an Al-Al3 Ni two-phase matrix
Assignee: United States Department of the Air Force
•
Filing: 1977-07-15
•
Granted: 1978-07-11
•
Expires: 1997-07-15
Abstract
Abstract An electrolytic process for removing aluminum from a solid two-phase matrix of aluminum and trialuminum nickelide filaments by passing an electric current between an inert anode, a cathode composed of the matrix while both are immersed in an aluminum halide containing molten salt electrolyte.
Inventors
- 👤 Charles L. Hussey
- 👤 John C. Nardi
- 👤 Armand A. Fannin, Jr.
- 👤 Lowell A. King
- 👤 John K. Erbacher
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 21:47
CPC Classifications
C; C30; C30B; C30B21/00; C30B21/02; C25; C25F; C25F3/00; C25F3/02; C30B29/00; C30B29/60; C30B29/62; Y; Y10; Y10T; Y10T428/00; Y10T428/12; Y10T428/12486
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
83 words
An electrolytic process for separating aluminum from a solid, two-phase matrix of aluminum and trialuminum nickelide filaments which comprises the steps of passing an electric current between (1) a cathode composed of an inert material and (2) an anode composed of a two phase matrix of aluminum and tri-aluminum nickelide filaments while (3) both anode and cathode are immersed in an anhydrous aluminum halide containing molten salt electrolyte to effectively remove said aluminum from said matrix without adversely affecting said trialuminum nickelide filaments.
Claim 2
Dependent Claim
83 words
An electrolytic process for separating aluminum from a solid, two-phase matrix of aluminum and trialuminum nickelide filaments which comprises the steps of passing an electric current between (1) a cathode composed of an inert material and (2) an anode composed of a two phase matrix of aluminum and tri-aluminum nickelide filaments while (3) both anode and cathode are immersed in an anhydrous aluminum halide containing molten salt electrolyte to effectively remove said aluminum from said matrix without adversely affecting said trialuminum nickelide filaments.
Claim 3
Dependent Claim
56 words
A process in accordance with claim 1 wherein said electrolyte is composed of a material having the formula AlX 3 .MY wherein X and Y are similar or dissimilar and selected from the group consisting of chlorine bromine and iodine; M is a material selected from the group consisting of alkali metal and tetrasubstituted ammonium compounds.
Claim 4
Dependent Claim
20 words
A process in accordance with claim 2 wherein said electrolyte is an equimolar mixture of aluminum chloride and sodium chloride.
Claim 5
Dependent Claim
20 words
A process in accordance with claim 2 wherein said electrolyte is a 2:1 molar ratio of aluminum chloride and ethylpyridinium.
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) | 1981-07-10 | 1982-01-09 | 1982-07-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-07-10 | 1986-01-09 | 1986-07-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-07-10 | 1990-01-09 | 1990-07-11 | $7700.00 | Window Closed / Lapsed |