US4136213A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Carbon article including electrodes and methods of making the same
Assignee: ExxonMobil Technology and Engineering Co
•
Filing: 1977-02-04
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Granted: 1979-01-23
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Expires: 1997-02-04
Abstract
Abstract Carbon compositions comprising carbon supported on oxide supports are provided by vapor deposition of the carbon. The carbon so deposited has the morphology of the underlying support. These carbon compositions are electrically conducting and are particularly useful as an electrode material.
Inventors
- 👤 Shun C. Fung
- 👤 Samuel J. Tauster
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 04:31
CPC Classifications
C; C04; C04B; C04B41/00; C04B41/009; C04B35/00; C04B35/515; C04B35/52; C04B41/45; C04B41/50; C04B41/5001; C04B41/80; C04B41/81; C04B41/85; H; H01; H01M; H01M4/00; H01M4/86; H01M4/96; Y; Y02; Y02E; Y02E60/00; Y02E60/30; Y02E60/50; Y10; Y10T; Y10T428/00; Y10T428/27; Y10T428/273; Y10T428/29; Y10T428/2982; Y10T428/2991
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
70 words
A process of forming an electrically conductive carbon composition comprising thermally decomposing a carbonaceous material in the presence of an oxide, said carbon being deposited in an amount ranging from about 2 wt.% to about 12 wt.%, thereby carbonizing the oxide, said oxide being selected from acid soluble oxides which remain nonconductive after being carbonized, and thereafter treating said carbonized nonconductive oxide with acid to render the composition electrically conductive.
Claim 2
Dependent Claim
70 words
A process of forming an electrically conductive carbon composition comprising thermally decomposing a carbonaceous material in the presence of an oxide, said carbon being deposited in an amount ranging from about 2 wt.% to about 12 wt.%, thereby carbonizing the oxide, said oxide being selected from acid soluble oxides which remain nonconductive after being carbonized, and thereafter treating said carbonized nonconductive oxide with acid to render the composition electrically conductive.
Claim 3
Dependent Claim
21 words
The process of claim 1 wherein the oxide is selected from the group consisting of Al 2 O 3 and MgO.
Claim 4
Dependent Claim
25 words
The process of claim 1 wherein the carbonaceous material is thermally decomposed at temperatures in the range of about 500° C. to about 750° C.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-01-22 | 1982-07-24 | 1983-01-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-01-22 | 1986-07-24 | 1987-01-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-01-22 | 1990-07-24 | 1991-01-23 | $7700.00 | Window Closed / Lapsed |