US2867508A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for producing carbon black
Assignee: Phillips Petroleum Co
•
Filing: 1952-01-03
•
Granted: 1959-01-06
•
Expires: 1972-01-03
Abstract
No abstract record available.
Inventors
- 👤 James Q Wood
- 👤 Lyle W Pollock
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 17:10
CPC Classifications
C; C09; C09C; C09C1/00; C09C1/44; C09C1/48; C09C1/50; C09C1/487; C09C1/56; C09C1/58
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
127 words
A PROCESS FOR PRODUCING CARBON BLACK COMPRISING THE STEPS OF PYROCHEMICALLY CONVERTING A FEED COMPRISING A MAJOR PORTION OF NORMALLY LIQUID HYDROCARBON AND A MINOR PORTION OF CARBON BLACK INTO A GASEOUS EFFLUENT COMPRISING GASES AND DRY CARBON BLACK PARTICLES SUSPENDED IN SAID EFFLUENT, COOLING SAID GASEOUS EFFLUENT, REMOVING THE MAJOR PORTION OF SAID SUSPENDED CARBON BLACK FROM SAID EFFLUENT BY DRY SEPARATION STEPS AS A DRY FLOCCULENT POWDER, REMOVING A MINOR PORTION OF SAID CARBON BLACK FROM SAID EFFLUENT BY WATER WASHING A PORTION OF SAID EFFLUENT TO REMOVE SAID CARBON BLACK PARTICLES IN THE FORM OF AN AQUEOUS SLURRY, AT LEAST PARTIALLY DEWATERING SAID SLURRY, MIXING SAID AT LEAST PARTIALLY DEWATERED SLURRY WITH A LIQUID AND RETURNING THE RESULTING MIXTURE TO A PYROCHEMICAL CONVERSION STEP.
Claim 2
Dependent Claim
127 words
A PROCESS FOR PRODUCING CARBON BLACK COMPRISING THE STEPS OF PYROCHEMICALLY CONVERTING A FEED COMPRISING A MAJOR PORTION OF NORMALLY LIQUID HYDROCARBON AND A MINOR PORTION OF CARBON BLACK INTO A GASEOUS EFFLUENT COMPRISING GASES AND DRY CARBON BLACK PARTICLES SUSPENDED IN SAID EFFLUENT, COOLING SAID GASEOUS EFFLUENT, REMOVING THE MAJOR PORTION OF SAID SUSPENDED CARBON BLACK FROM SAID EFFLUENT BY DRY SEPARATION STEPS AS A DRY FLOCCULENT POWDER, REMOVING A MINOR PORTION OF SAID CARBON BLACK FROM SAID EFFLUENT BY WATER WASHING A PORTION OF SAID EFFLUENT TO REMOVE SAID CARBON BLACK PARTICLES IN THE FORM OF AN AQUEOUS SLURRY, AT LEAST PARTIALLY DEWATERING SAID SLURRY, MIXING SAID AT LEAST PARTIALLY DEWATERED SLURRY WITH A LIQUID AND RETURNING THE RESULTING MIXTURE TO A PYROCHEMICAL CONVERSION STEP.
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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) | 1962-01-05 | 1962-07-07 | 1963-01-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-01-05 | 1966-07-07 | 1967-01-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-01-05 | 1970-07-07 | 1971-01-06 | $7700.00 | Window Closed / Lapsed |