US3035989A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of high purity coke and graphite
Assignee: Union Carbide Corp
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Filing: 1960-08-08
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Granted: 1962-05-22
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Expires: 1980-08-08
Abstract
No abstract record available.
Inventors
- 👤 Charles V Mitchell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 14:04
CPC Classifications
G; G21; G21C; G21C5/00; G21C5/12; G21C5/126; C; C01; C01B; C01B32/00; C10; C10B; C10B55/00; Y; Y02; Y02E; Y02E30/00; Y02E30/30
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
97 words
A PROCESS FOR MAKING HIGH PURITY GRAPHITIZABLE COKE COMPRISING PLACING IN A HEATING VESSEL A STARTING MATERIAL SELECTED FROM THE GROUP CONSISTING OF ACENAPHTHYLENE, NAPHTHACENE AND DECACYCLENE, COKING SAID MATERIAL BY HEATING THE SAME AT A RATE OF BETWEEN ABOUT 10*C. AND ABOUT 100*C. RISE PER HOUR IN AN INERT ATMOSPHERE UNDER AMBIENT PRESSURE TO A TEMPERATURE BETWEEN ABOUT 350* AND 400*C. MAINTAINING SAID MATERIAL AT SAID TEMPERATURE FOR ABOUT TEN HOURS, INCREASING SAID TEMPERATURE TO BETWEEN ABOUT 450*C., AND 500*C., MAINTAINING SAID TEMPERATURE FOR ABOUT 1 TO ABOUT 10 HOURS, AND THEN COOLING THE THUS-FORMED COKE.
Claim 2
Dependent Claim
97 words
A PROCESS FOR MAKING HIGH PURITY GRAPHITIZABLE COKE COMPRISING PLACING IN A HEATING VESSEL A STARTING MATERIAL SELECTED FROM THE GROUP CONSISTING OF ACENAPHTHYLENE, NAPHTHACENE AND DECACYCLENE, COKING SAID MATERIAL BY HEATING THE SAME AT A RATE OF BETWEEN ABOUT 10*C. AND ABOUT 100*C. RISE PER HOUR IN AN INERT ATMOSPHERE UNDER AMBIENT PRESSURE TO A TEMPERATURE BETWEEN ABOUT 350* AND 400*C. MAINTAINING SAID MATERIAL AT SAID TEMPERATURE FOR ABOUT TEN HOURS, INCREASING SAID TEMPERATURE TO BETWEEN ABOUT 450*C., AND 500*C., MAINTAINING SAID TEMPERATURE FOR ABOUT 1 TO ABOUT 10 HOURS, AND THEN COOLING THE THUS-FORMED COKE.
References Cited (Backward Citations)
US2670322A
Cited
US2764539A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-05-21 | 1965-11-20 | 1966-05-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-05-21 | 1969-11-20 | 1970-05-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-05-21 | 1973-11-20 | 1974-05-22 | $7700.00 | Window Closed / Lapsed |