US3657592A
Expired / Lapsed
US
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Electrode joint cement
Assignee: Union Carbide Corp
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Filing: 1970-04-22
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Granted: 1972-04-18
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Expires: 1990-04-22
Abstract
Abstract A high temperature cement, comprising elemental powders of boron and a transition metal and a carbonizable binder, is provided for joining sections of a carbonaceous electric-furnace electrode column. The cement is initially heated to between about 90* C. and 130* C. to thermoset the carbonizable binder and then the temperature is elevated to above 1,000* C. to react the transition metal with the boron to form a strong cemented bond having excellent thermal and electrical properties.
Inventors
- 👤 Arnold Arbuthnot Kellar
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 09:19
CPC Classifications
C; C04; C04B; C04B37/00; C04B37/008; C04B35/00; C04B35/622; C04B35/626; C04B35/63; C04B35/632; C04B35/634; C04B35/63448; C04B35/63472; C04B35/63476; C04B37/003; C04B37/005; H; H05; H05B; H05B7/00; H05B7/02; H05B7/14; C04B2235/00; C04B2235/02; C04B2235/50; C04B2235/54; C04B2235/5418; C04B2235/5427; C04B2235/5436; C04B2235/65; C04B2235/656; C04B2235/6567; C04B2237/00; C04B2237/02; C04B2237/04; C04B2237/06; C04B2237/068; C04B2237/08; C04B2237/09; C04B2237/30; C04B2237/32; C04B2237/36; C04B2237/363; C04B2237/50; C04B2237/61; C04B2237/62; C04B2237/70; C04B2237/708; Y; Y02; Y02P; Y02P10/00; Y02P10/25; Y10; Y10T; Y10T403/00; Y10T403/47
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
26 words
The electrode joint as in claim 1 wherein said cement contains at least a material selected from a group consisting of particulated carbon, silicon and oil.
Claim 2
Dependent Claim
27 words
The electrode joint as in claim 2 wherein said transition metal is titanium and wherein the boron to titanium ratio is between about 3:2 and about 2:3.
Claim 3
Dependent Claim
20 words
The electrode joint of claim 1 wherein said cemented bond is between about .005 inch and about 0.030 inch thick.
Claim 4
Dependent Claim
26 words
The electrode joint of claim 4 wherein said transition metal is titanium and wherein the boron to titanium ratio is between about 3:2 and about 2:3.
Claim 5
Dependent Claim
25 words
The electrode joint of claim 1 wherein said cemented bond contains a textile material and is between about 0.010 inch and about 0.035 inch thick.
Claim 6
Dependent Claim
25 words
The electrode joint of claim 6 wherein said transition metal is titanium and said boron to titanium ratio is between about 3:2 and about 2:3.
References Cited (Backward Citations)
US3429759A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-04-18 | 1975-10-18 | 1976-04-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-04-18 | 1979-10-18 | 1980-04-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-04-18 | 1983-10-18 | 1984-04-18 | $7700.00 | Window Closed / Lapsed |