US3362790A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Furnace for making high abrasion and intermediate super abrasion furnace carbon blacks
Assignee: Phillips Petroleum Co
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Filing: 1965-04-23
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Granted: 1968-01-09
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Expires: 1985-04-23
Abstract
No abstract record available.
Inventors
- 👤 James Q Wood
- 👤 Jr Alfred A Hoffman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 16:11
CPC Classifications
C; C09; C09C; C09C1/00; C09C1/44; C09C1/48; C09C1/487; B; B01; B01J; B01J19/00; C09C1/50
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
155 words
A FURNACE FOR MAKING ISAF CARBON BLACK AND HAF CARBON BLACK WITH ABUT THE SAME RATE OF EFFLUENT SMOKE PRODUCTION, COMPRISING IN COMBINATION A HEAT-INSULATED FURNACE HAVING A CHAMBER CONSISTING ESSENTIALLY OF THE FOLLOWING FOUR GENERALLY-CYLINDRICAL SECTIONS CONNECTED AXIALLY IN SERIES IN THE FOLLOWING ORDER GOING DOWNSTREAM: AN AXIAL HYDROCARBON INLET SECTION; A COMBUSTION SECTION PROVIDED WITH FUEL AND FREE OXYGEN-CONTAINING GAS INLETS; AN ISAF REACTION OF A DIAMETER LESS THAN HALF THE DIAMETER OF SAID CONBUSTION SECTION AND BETWEEN 4.5 TO 5.5 FEET LONG PROVIDED WITH AN ISAF WATER QUENCH ADAPTED TO DISCHARGE WATER SPRAY THEREIN ADJACENT THE DOWNSTREAM END OF SAID ISAF REACTION SECTION; AND AN HAF REACTION SECTION OF A DIAMETER FROM 1 1/16 TO 1 2/3 THE DIAMETER OF SAID ISAF REACTION SECTION AND BETWEEN 8 TO 11 FEET LONG PROVIDED WITH AN HAF WATER QUENCH ADAPTED TO DISCHARGE WATER SPRAY THEREIN ADJACENT THE DOWNSTREAM END OF SAID HAF REACTION SECTION.
Claim 2
Dependent Claim
155 words
A FURNACE FOR MAKING ISAF CARBON BLACK AND HAF CARBON BLACK WITH ABUT THE SAME RATE OF EFFLUENT SMOKE PRODUCTION, COMPRISING IN COMBINATION A HEAT-INSULATED FURNACE HAVING A CHAMBER CONSISTING ESSENTIALLY OF THE FOLLOWING FOUR GENERALLY-CYLINDRICAL SECTIONS CONNECTED AXIALLY IN SERIES IN THE FOLLOWING ORDER GOING DOWNSTREAM: AN AXIAL HYDROCARBON INLET SECTION; A COMBUSTION SECTION PROVIDED WITH FUEL AND FREE OXYGEN-CONTAINING GAS INLETS; AN ISAF REACTION OF A DIAMETER LESS THAN HALF THE DIAMETER OF SAID CONBUSTION SECTION AND BETWEEN 4.5 TO 5.5 FEET LONG PROVIDED WITH AN ISAF WATER QUENCH ADAPTED TO DISCHARGE WATER SPRAY THEREIN ADJACENT THE DOWNSTREAM END OF SAID ISAF REACTION SECTION; AND AN HAF REACTION SECTION OF A DIAMETER FROM 1 1/16 TO 1 2/3 THE DIAMETER OF SAID ISAF REACTION SECTION AND BETWEEN 8 TO 11 FEET LONG PROVIDED WITH AN HAF WATER QUENCH ADAPTED TO DISCHARGE WATER SPRAY THEREIN ADJACENT THE DOWNSTREAM END OF SAID HAF REACTION SECTION.
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) | 1971-01-08 | 1971-07-10 | 1972-01-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-01-08 | 1975-07-10 | 1976-01-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-01-08 | 1979-07-10 | 1980-01-09 | $7700.00 | Window Closed / Lapsed |