US2843874A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process and apparatus for densifying and pelleting carbon black
Assignee: Phillips Petroleum Co
•
Filing: 1954-07-26
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Granted: 1958-07-22
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Expires: 1974-07-26
Abstract
No abstract record available.
Inventors
- 👤 James Q Wood
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 01:58
CPC Classifications
C; C09; C09C; C09C1/00; C09C1/44; C09C1/48; C09C1/56; C09C1/60; C01; C01P; C01P2006/00; C01P2006/10; Y; Y10; Y10S; Y10S425/00; Y10S425/101
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
79 words
APPARATUS FOR PELLETING CARBON BLACK COMPRISING IN COMBINATION A SERIES OF PELLET MILLS; A PRE-DENSIFYING MILL CONNECTED BY CONVEYOR MEANS WITH THE FEED INLET OF EACH PELLET MILL; A SERIES OF CARBON BLACK FURNACES OR REACTOR HAVING A COMMON OXYGEN-CONTAINING-GAS SUPPLY LINE; MEANS FOR FEEDING CARBON BLACK FROM SAID FURANCE TO SAID PRE-DENSIFYING MILL; AND MEANS FOR REGULATING THE RATE OF DENSIFYING IN SAID PRE-DENSIFYING MILL IN RESPONSE TO THE RATE OF FLOW OF FAS IN SAID SUPPLY LINE.
Claim 2
Dependent Claim
106 words
A PROCESS FOR PELLETING LOOSE CARBON BLACK WHICH COMPRISES PASSING LOOSE BLACK FROM A CARBON BLACK FURANCE TO A DEGASSING ZONE; AGITATING SAID BLACK IN SAID ZONE SO AS TO PARTIALLY DEGAS AND DESIFY SAME; PASSING RESULTING BLACK TO AN UNOBSTRUCTED ROTARY TUMBLING ZONE AND THERE TUMBLING SAID BLACK UNDER CONDITIONS SUCH AS TO PRODUCE A BLACK OF SUBSTANTIALLY UNIFORM DENSITY SUBSTANTIALLY GREATER THAN THAT OF THE FEED TO SAID ROTARY TUMBLING ZONE; REGULATING THE PASSING OF BLACK FROM SAID DEGASSING ZONE TO SAID TUMBLING ZONE SO AS TO MAINTAIN A CONSTANT LEVEL OF BLACK IN SAID DEGASSING ZONE; AND THEREAFTER PELLETING THE RESULTING DENSIFIED BLACK.
References Cited (Backward Citations)
US2120540A
Cited
US2121633A
Cited
US2164164A
Cited
US2131686A
Cited
GB578658A
Cited
US2502106A
Cited
US2457962A
Cited
US2550802A
Cited
US2511088A
Cited
US2695837A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-07-21 | 1962-01-20 | 1962-07-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-07-21 | 1966-01-20 | 1966-07-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-07-21 | 1970-01-20 | 1970-07-22 | $7700.00 | Window Closed / Lapsed |