US3280042A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for producing graphite electrodes
Assignee: Individual
•
Filing: 1963-10-28
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Granted: 1966-10-18
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Expires: 1983-10-28
Abstract
No abstract record available.
Inventors
- 👤 Bannikov Grigo Konstantinovich
- 👤 Brusko Grigory Gavrilovich
- 👤 Livshits Abram Lazarevich
- 👤 Sigariov Alexander Mironovich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 21:46
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/515; C04B35/52; C04B35/528; C04B35/532; C25; C25B; C25B11/00; C25B11/04; C25B11/042; C25B11/043; C25B11/044
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
121 words
THE METHOD OF PRODUCING AN ELECTRODE ARTICLE CONSISTING ESSENTIALLY OF CHARGING A MOLD WITH THE FOLLOWING INGREDIENTS: A 50-95% BY WEIGHT PITCH SEMI-COKE HAVING 8-23% BY WEIGHT VOLATILE COMPONENTS WHICH ARE LIBERATED UPON HATING TO 800*C. AND DOES NOT CONTAIN INGREDIENTS FUSIBLE BELOW 425*C., 0-35% BY WEIGHT COKE, 5-15% BY WEIGHT GRAPHITE, AND 0-1% OF A SALT SELECTED FROM THE GROUP CONSISTING OF IRON CHLORIDE AND ALUMINUN CHLORIDE; AND THEN MOLDING SAID CHARGE UNDER A PRESSURE OF 500-700 KG./CM.2, THEN SUBSTANTIALLY CONTINUOUSLY GRADUALLY INCREASINGLY HEATING SAID MOLD CONTAINING CHARGE TO APPROXIMATELY 1,300*C. OVER A PERIOD OF BETWEEN 343-373 HOURS, THEREAFTER THE THEREBY PRODUCED BLANKS ARE GRAPHITIZED BY HEAT TREATMENT UNTIL THE CORE OF THE BLANK REACHES A TEMPERATURE OF BETWEEN 2,450*-2,550*C.
Claim 2
Independent Claim
121 words
THE METHOD OF PRODUCING AN ELECTRODE ARTICLE CONSISTING ESSENTIALLY OF CHARGING A MOLD WITH THE FOLLOWING INGREDIENTS: A 50-95% BY WEIGHT PITCH SEMI-COKE HAVING 8-23% BY WEIGHT VOLATILE COMPONENTS WHICH ARE LIBERATED UPON HATING TO 800*C. AND DOES NOT CONTAIN INGREDIENTS FUSIBLE BELOW 425*C., 0-35% BY WEIGHT COKE, 5-15% BY WEIGHT GRAPHITE, AND 0-1% OF A SALT SELECTED FROM THE GROUP CONSISTING OF IRON CHLORIDE AND ALUMINUN CHLORIDE; AND THEN MOLDING SAID CHARGE UNDER A PRESSURE OF 500-700 KG./CM.2, THEN SUBSTANTIALLY CONTINUOUSLY GRADUALLY INCREASINGLY HEATING SAID MOLD CONTAINING CHARGE TO APPROXIMATELY 1,300*C. OVER A PERIOD OF BETWEEN 343-373 HOURS, THEREAFTER THE THEREBY PRODUCED BLANKS ARE GRAPHITIZED BY HEAT TREATMENT UNTIL THE CORE OF THE BLANK REACHES A TEMPERATURE OF BETWEEN 2,450*-2,550*C.
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) | 1969-10-17 | 1970-04-18 | 1970-10-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-10-17 | 1974-04-18 | 1974-10-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-10-17 | 1978-04-18 | 1978-10-18 | $7700.00 | Window Closed / Lapsed |