Patent US4536359A successfully refreshed from Google Patents.
US4536359A
Expired / Lapsed
US
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Method of manufacturing carbon electrode
Assignee: Nikku Industry Co Ltd
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Filing: 1983-10-11
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Granted: 1985-08-20
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Expires: 2003-10-11
Abstract
Abstract The present invention provides a method of manufacturing improved carbon electrodes. According to this method, the raw material for the carbon electrodes is pulverized and then kneaded with a binder. The kneaded mixture thus obtained is compressed under reduced pressure and thereafter extrusion-molded. This molded product is baked to obtain the desired carbon electrodes.
Inventors
- 👤 Torata Tanaka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 18:46
CPC Classifications
B; B30; B30B; B30B11/00; B30B11/22; B30B11/26; C; C04; C04B; C04B35/00; C04B35/515; C04B35/52; C04B35/528; C04B35/532; C25; C25C; C25C3/00; C25C3/06; C25C3/08; C25C3/12; C25C3/125; H; H05; H05B; H05B7/00; H05B7/02; H05B7/06; H05B7/08; H05B7/085
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
161 words
A method of manufacturing carbon electrodes, which comprises the steps of: kneading 100 parts of regular coke with 25 to 50 parts of a binder selected from the group consisting of coal tar pitch, coal tar and a synthetic resin at a temperature of 140° to 170° C., dividing the resultant kneaded mixture into a plurality of portions, compressing sequentially portion by portion the divided portions of the kneaded mixture at a pressure of 1500 to 3000 tons while being subjected to a vacuum below 300 Torr in a manner such that when a first divided portion is compressed, a second portion is supplied on top of the first compressed portion and compressed at the same pressure under the same vacuum, extrusion-molding the compressed mixture as a whole, after the whole of the divided portions of the mixture is thus compressed, baking the resultant extrudate, filling the baked product with an impregnator, and subjecting the resultant product to a secondary baking.
Claim 2
Independent Claim
161 words
A method of manufacturing carbon electrodes, which comprises the steps of: kneading 100 parts of regular coke with 25 to 50 parts of a binder selected from the group consisting of coal tar pitch, coal tar and a synthetic resin at a temperature of 140° to 170° C., dividing the resultant kneaded mixture into a plurality of portions, compressing sequentially portion by portion the divided portions of the kneaded mixture at a pressure of 1500 to 3000 tons while being subjected to a vacuum below 300 Torr in a manner such that when a first divided portion is compressed, a second portion is supplied on top of the first compressed portion and compressed at the same pressure under the same vacuum, extrusion-molding the compressed mixture as a whole, after the whole of the divided portions of the mixture is thus compressed, baking the resultant extrudate, filling the baked product with an impregnator, and subjecting the resultant product to a secondary baking.
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) | 1988-08-19 | 1989-02-18 | 1989-08-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-08-19 | 1993-02-18 | 1993-08-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-08-19 | 1997-02-18 | 1997-08-20 | $7700.00 | Window Closed / Lapsed |