US3661736A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Refractory hard metal composite cathode aluminum reduction cell
Assignee: Olin Corp
•
Filing: 1969-05-07
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Granted: 1972-05-09
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Expires: 1989-05-07
Abstract
Abstract The present invention is directed to cathodes of fused refractory hard metal alloy composited with certain bonding agents and their use, replacing the conventional carbon lining of an aluminum reduction cell.
Inventors
- 👤 Robin D Holliday
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 09:34
CPC Classifications
C; C25; C25C; C25C3/00; C25C3/06; C25C3/08
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
25 words
A process according to claim 1 in which metallic aluminum runs off said cathode and is collected at a point other than at said cathode.
Claim 2
Dependent Claim
24 words
A process according to claim 2 in which said aluminum flows by gravity from said cathode to a separate collection receptacle within said cell.
Claim 3
Dependent Claim
22 words
A process according to claim 1 wherein said refractory hard metal comprises an arc melted material comprising titanium boride and titanium carbide.
Claim 4
Dependent Claim
12 words
A process according to claim 1 wherein said matrix comprises aluminum carbide.
Claim 5
Dependent Claim
18 words
A process according to claim 1 wherein said refractory hard metal is at least 0.25 inch average diameter.
Claim 6
Dependent Claim
20 words
A process according to claim 1 wherein said matrix comprises an arc melted material comprising aluminum carbide and titanium carbide.
Claim 7
Dependent Claim
99 words
Apparatus for producing aluminum comprising means for confining a molten electrolyte containing alumina, at least one anode contacting said electrolyte, at least one cathode contacting said electrolyte, said cathode comprising a composite of refractory hard metal imbedded in an electrically conductive matrix said matrix selected from the group consisting of aluminum carbide and an arc melted material comprising aluminum carbide and titanium carbide wherein the particles of said hard material are relatively larger than the particles of said matrix, means for causing electrical cUrrent flow between said anode and said cathode whereby aluminum ions are deposited on said cathode.
Claim 8
Dependent Claim
20 words
Apparatus according to claim 8 in which means are provided for continually removing and collecting metallic aluminum from said cathode.
Claim 9
Dependent Claim
24 words
Apparatus according to claim 9 in which the means for removing aluminum from said cathode is means which support said cathode on an incline.
Claim 10
Dependent Claim
17 words
Apparatus according to claim 8 in which said means for collecting is a chamber within said cell.
Claim 11
Dependent Claim
22 words
An apparatus according to claim 8 wherein said refractory hard metal comprises an arc melted material comprising titanium boride and titanium carbide.
Claim 12
Dependent Claim
12 words
An apparatus according to claim 8 wherein said matrix comprises aluminum carbide.
Claim 13
Dependent Claim
18 words
An apparatus according to claim 8 wherein said refractory hard metal is at least 0.25 inch average diameter.
Claim 14
Dependent Claim
20 words
An apparatus according to claim 8 wherein said matrix comprises an arc melted material comprising aluminum carbide and titanium carbide.
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) | 1975-05-09 | 1975-11-08 | 1976-05-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-09 | 1979-11-08 | 1980-05-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-09 | 1983-11-08 | 1984-05-09 | $7700.00 | Window Closed / Lapsed |