US3856926A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for preparing carbon paste
Assignee: Resonac Holdings Corp
•
Filing: 1972-06-15
•
Granted: 1974-12-24
•
Expires: 1992-06-15
Abstract
Abstract Carbon paste is produced by kneading a filler such as coke and a binder such as tar or pitch under mechanically pressurized conditions. The resulting carbon paste has excellent properties and is used for industrial carbon products such as artificialgraphite electrodes, Sodeberg electrodes, carbon blocks, carbon bricks and the like.
Inventors
- 👤 K Tajima
- 👤 N Koike
- 👤 T Yamaura
- 👤 M Takeda
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 16:49
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/515; C04B35/52; C04B35/522; C04B35/521; C04B35/528; C04B35/532; C25; C25B; C25B11/00; C25B11/04; C25B11/042; C25B11/043
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
130 words
IN A METHOD FOR PRODUCING A CARBON BODY IN WHICH A CARBON PASTE IS KNEADED IN A KNEADER HAVING A $ OR Z SHAPED ROTATING WING, THE IMPROVEMENT IN WHICH: A. MECHINICAL PRESSURE OF 0.2 TO 1.0KG/CM2 IS APPLIED TO THE CARBON PASTE IN SAID KNEADER DURING THE KNEADING BY PRESSING A PLATE THEREAGAINST; B. THE BINDER CONSISTUTES 19 TO 28% OF SAID PLASTE; C. THE PASTE IS KNEADED FOR A PERIOD OF 5 TO 60 MINUTES; D. THE PASTE IS KNEADED AT A TEMPERATURE BETWEEN 20*C AND 60*C ABOVE THE SOFTENING POINT OF THE BINDER; E. THE KNEADED ASTE IS SHAPED AND BAKED AT A TEMPERATURE OF 800* TO 1300*C, AND F. THE SHAPED BAKED PASTE IS GRAPHITIZED AT A TEMPERATURE BETWEEN 2500* AND 3400*C TO YIELD SAID BODY.
Claim 2
Dependent Claim
130 words
IN A METHOD FOR PRODUCING A CARBON BODY IN WHICH A CARBON PASTE IS KNEADED IN A KNEADER HAVING A $ OR Z SHAPED ROTATING WING, THE IMPROVEMENT IN WHICH: A. MECHINICAL PRESSURE OF 0.2 TO 1.0KG/CM2 IS APPLIED TO THE CARBON PASTE IN SAID KNEADER DURING THE KNEADING BY PRESSING A PLATE THEREAGAINST; B. THE BINDER CONSISTUTES 19 TO 28% OF SAID PLASTE; C. THE PASTE IS KNEADED FOR A PERIOD OF 5 TO 60 MINUTES; D. THE PASTE IS KNEADED AT A TEMPERATURE BETWEEN 20*C AND 60*C ABOVE THE SOFTENING POINT OF THE BINDER; E. THE KNEADED ASTE IS SHAPED AND BAKED AT A TEMPERATURE OF 800* TO 1300*C, AND F. THE SHAPED BAKED PASTE IS GRAPHITIZED AT A TEMPERATURE BETWEEN 2500* AND 3400*C TO YIELD SAID BODY.
References Cited (Backward Citations)
US3254143A
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 |