US3390960A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of controlling surface area of carbon black
Assignee: Phillips Petroleum Co
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Filing: 1966-05-09
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Granted: 1968-07-02
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Expires: 1986-05-09
Abstract
No abstract record available.
Inventors
- 👤 Glenn J Forseth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 17:21
CPC Classifications
C; C09; C09C; C09C1/00; C09C1/44; C09C1/48; C09C1/56; C09C1/50; C01; C01P; C01P2006/00; C01P2006/12; C01P2006/19
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
157 words
A METHOD OF CONTROLLING THE SURFACE AREA OF CARBON BLACK FORMED BY FEEDING INTO ONE END OF A CARBON BLACK FURNACE A STREAM OF NORMALLY LIQUID HYDROCARBON OIL AND A COMBUSTING STREAM OF AIR AND FUEL GAS UNDER CONDITIONS WHICH PRODUCE A BLACK OF SELECTED SURFACE AREA, AND RECOVERING A GASEOUS EFFUENT FROM THE OTHER END THEREOF CONTAINING SAID BLACK, WHICH METHOD COMPRISES THE STEPS OF: (1) ANALYZING SAID EFFUENT TO DETERMINE CO CONCENTRATION THEREIN AS AN INDICATOR OF SURFACE AREA OF SAID BLACK; (2) MAINTAINING A SUBSTANTIALLY CONSTANT RATIO OF AIR TO FUEL GAS IN SAID COMBUSTING STREAM; AND (3) VARYING THE FLOW RATE OF ONE OF SAID COMBUSTING AIR AND SAID OIL AS SAID CO CONCENTRATION VARIES SO AS TO MAINTAIN SAID CONCENTRATIN RELATIVELY CONSTANT, INCREASING THE RATIO OF COMBUSTING AIR TO OIL WHEN SAID CO CONCENTRATION RISES ABOVE A SELECTED VALUE AND DECREASING SAID AIR/OIL RATIO WHEN SAID CO CONCENTRATION FALLS BELOW SAID VALUE.
Claim 2
Independent Claim
157 words
A METHOD OF CONTROLLING THE SURFACE AREA OF CARBON BLACK FORMED BY FEEDING INTO ONE END OF A CARBON BLACK FURNACE A STREAM OF NORMALLY LIQUID HYDROCARBON OIL AND A COMBUSTING STREAM OF AIR AND FUEL GAS UNDER CONDITIONS WHICH PRODUCE A BLACK OF SELECTED SURFACE AREA, AND RECOVERING A GASEOUS EFFUENT FROM THE OTHER END THEREOF CONTAINING SAID BLACK, WHICH METHOD COMPRISES THE STEPS OF: (1) ANALYZING SAID EFFUENT TO DETERMINE CO CONCENTRATION THEREIN AS AN INDICATOR OF SURFACE AREA OF SAID BLACK; (2) MAINTAINING A SUBSTANTIALLY CONSTANT RATIO OF AIR TO FUEL GAS IN SAID COMBUSTING STREAM; AND (3) VARYING THE FLOW RATE OF ONE OF SAID COMBUSTING AIR AND SAID OIL AS SAID CO CONCENTRATION VARIES SO AS TO MAINTAIN SAID CONCENTRATIN RELATIVELY CONSTANT, INCREASING THE RATIO OF COMBUSTING AIR TO OIL WHEN SAID CO CONCENTRATION RISES ABOVE A SELECTED VALUE AND DECREASING SAID AIR/OIL RATIO WHEN SAID CO CONCENTRATION FALLS BELOW SAID VALUE.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-07-02 | 1972-01-01 | 1972-07-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-07-02 | 1976-01-01 | 1976-07-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-07-02 | 1980-01-01 | 1980-07-02 | $7700.00 | Window Closed / Lapsed |