Patent US3856574A successfully refreshed from Google Patents.
US3856574A
Expired / Lapsed
US
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Electrode and method of manufacture
Assignee: Kureha Corp
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Filing: 1972-02-02
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Granted: 1974-12-24
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Expires: 1992-02-02
Abstract
Abstract A porous carbon electrode containing a plurality of hollow carbon micro-spheres dispersed in a carbonized matrix. A process for producing same which includes mixing hollow carbon microspheres with a thermo-setting resin or a high polymer, molding the mixture to provide a green carbon electrode body, baking and carbonizing the body, followed by an activation treatment.
Inventors
- 👤 Y Amagi
- 👤 Z Skiiki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 23:26
CPC Classifications
H; H01; H01M; H01M4/00; H01M4/86; H01M4/96; Y; Y02; Y02E; Y02E60/00; Y02E60/30; Y02E60/50
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
76 words
A POROUS CARBON ELECTRODE HAVING AN AVERAGE ETER OF 0.5 TO 20 U, A POROSITY OF 5 TO 50%, A BULK DENSITY OF 0. TO 0.9 G/CC, A SURFACE-TO-WEIGHT RATIO OF 600 TO 2,000 M2/G AND A COMPRESSIVE STRENGTH OF 20 TO 400 KG/CM2, SAID ELECTRODE COMPRISING HOLLOW CARBON MICRO-SPHERES DISPERSED IN A CARBONIZED MATRIX WHEREIN SAID HOLLOW CARBON MICRO-SPHERES HAVE GRAIN DIAMETERS OF 5 TO 100 U AND WALL THICKNESS OF 0.5 TO 25 U.
Claim 2
Dependent Claim
76 words
A POROUS CARBON ELECTRODE HAVING AN AVERAGE ETER OF 0.5 TO 20 U, A POROSITY OF 5 TO 50%, A BULK DENSITY OF 0. TO 0.9 G/CC, A SURFACE-TO-WEIGHT RATIO OF 600 TO 2,000 M2/G AND A COMPRESSIVE STRENGTH OF 20 TO 400 KG/CM2, SAID ELECTRODE COMPRISING HOLLOW CARBON MICRO-SPHERES DISPERSED IN A CARBONIZED MATRIX WHEREIN SAID HOLLOW CARBON MICRO-SPHERES HAVE GRAIN DIAMETERS OF 5 TO 100 U AND WALL THICKNESS OF 0.5 TO 25 U.
Claim 3
Dependent Claim
29 words
The porous carbon electrode of claim 1 wherein the ratio of said matrix to said hollow carbon micro-spheres is within the range of 5 to 60 % by weight.
Claim 4
Dependent Claim
16 words
A porous carbon electrode as defined by claim 1 in the shape of a hollow cylinder.
References Cited (Backward Citations)
US2310108A
Cited
US3175918A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-12-23 | 1978-06-24 | 1978-12-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-12-23 | 1982-06-24 | 1982-12-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-12-23 | 1986-06-24 | 1986-12-24 | $7700.00 | Window Closed / Lapsed |