US2866689A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for preparing feed stock for carbon black production
Assignee: Phillips Petroleum Co
•
Filing: 1953-11-30
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Granted: 1958-12-30
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Expires: 1973-11-30
Abstract
No abstract record available.
Inventors
- 👤 Sherwood C Samuels
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 04:35
CPC Classifications
C; C09; C09C; C09C1/00; C09C1/44; C09C1/48; C09C1/50; C10; C10G; C10G21/00; C10G21/06; C10G21/08; C10G21/10
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
68 words
A PROCESS OF PRODUCING CARBON BLACK, COMPRISING EXTRACTING A HYDROCARBON FEED HAVING A BOILING RANGE OF 350 TO 950*F. WITH A SELECTIVE SOLVENT CONSISTING OF SO2; RECOVERING AN EXTRACT FROM SAID EXTRACTION STEP; COOLING SAID EXTRACT TO A TEMPERATURE OF ABOUT 150*F.; TREATING SAID COOLED EXTRACT WITH 0.068 TO 0.075 POUND OF ANHYDROUS AMMONIA PER BARREL OF SAID EXTRACT; AND BURNING AT LEAST A PORTIION OF SAID EXTRACT.
References Cited (Backward Citations)
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US1917736A
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US2302303A
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US2651594A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-12-29 | 1962-06-30 | 1962-12-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-12-29 | 1966-06-30 | 1966-12-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-12-29 | 1970-06-30 | 1970-12-30 | $7700.00 | Window Closed / Lapsed |