US3301694A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of furnace carbon black having properties approximating those of channel carbon black
Assignee: Phillips Petroleum Co
•
Filing: 1964-07-27
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Granted: 1967-01-31
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Expires: 1984-07-27
Abstract
No abstract record available.
Inventors
- 👤 Kraus Gerard
- 👤 Yuan C Fu
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 05:12
CPC Classifications
C; C09; C09C; C09C1/00; C09C1/44; C09C1/48; C09C1/56; C01; C01P; C01P2006/00; C01P2006/12; C01P2006/19; C01P2006/22
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
133 words
A PROCES FOR PRODUCING A FURNACE CARBON BLACK HAVING PROPERTIES APPROXIMATING THOSE OF CHANNEL CARBON BLACK WITH RESPECT TO PH, STRUCTURE AND MODULUS WHICH PROCESS COMPRISES: CHARGING A HYDROCARBON FEEDSTOCK TO A CARBON BLACKPRODUCING FURNACE OPERATED UNDER CONDITIONS TO PRODUCE CARBON BLACK HAVING AN OIL ABSORPTION VALUE OF NOT MORE THAN ABOUT 1 RECOVERING CARBON BLACK FROM THE FURNACE EFFLUENT GASES; CONTACTING THE CARBON BLACK FROM SAID FURNACE WITH AN AMOUNT OF NITRIC ACID SUFFICIENT TO REDUCE THE PH OF THE CARBON BLACK TO A VALUE IN THE RANGE OF ABOUT 2 TO 5; ADDING ABOUT 40 TO 60 WEIGHT PERCENT PELLETING WATER TO THE CARBON BLACK; PELLETING THE CARBON BLACK IN A PELLETING STEP; DRYING THE PELLETED BLACK AT A TEMPERATURE OF ABOUT 150*C. TO 210*C.; AND RECOVERING THE CARBON BLACKSO PRODUCED.
Claim 2
Dependent Claim
133 words
A PROCES FOR PRODUCING A FURNACE CARBON BLACK HAVING PROPERTIES APPROXIMATING THOSE OF CHANNEL CARBON BLACK WITH RESPECT TO PH, STRUCTURE AND MODULUS WHICH PROCESS COMPRISES: CHARGING A HYDROCARBON FEEDSTOCK TO A CARBON BLACKPRODUCING FURNACE OPERATED UNDER CONDITIONS TO PRODUCE CARBON BLACK HAVING AN OIL ABSORPTION VALUE OF NOT MORE THAN ABOUT 1 RECOVERING CARBON BLACK FROM THE FURNACE EFFLUENT GASES; CONTACTING THE CARBON BLACK FROM SAID FURNACE WITH AN AMOUNT OF NITRIC ACID SUFFICIENT TO REDUCE THE PH OF THE CARBON BLACK TO A VALUE IN THE RANGE OF ABOUT 2 TO 5; ADDING ABOUT 40 TO 60 WEIGHT PERCENT PELLETING WATER TO THE CARBON BLACK; PELLETING THE CARBON BLACK IN A PELLETING STEP; DRYING THE PELLETED BLACK AT A TEMPERATURE OF ABOUT 150*C. TO 210*C.; AND RECOVERING THE CARBON BLACKSO PRODUCED.
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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) | 1970-01-30 | 1970-08-01 | 1971-01-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-01-30 | 1974-08-01 | 1975-01-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-01-30 | 1978-08-01 | 1979-01-31 | $7700.00 | Window Closed / Lapsed |