Patent US2599981A successfully refreshed from Google Patents.
US2599981A
Expired / Lapsed
US
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Carbon black
Assignee: Columbian Carbon Co
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Filing: 1949-12-22
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Granted: 1952-06-10
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Expires: 1969-12-22
Abstract
No abstract record available.
Inventors
- 👤 Wesley C Ekholm
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 23:39
CPC Classifications
C; C09; C09C; C09C1/00; C09C1/44; C09C1/48; C09C1/50
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
193 words
THE PROCESS FOR PRODUCING CARBON BLACK COMPRISING IN COMBINATION THE FOLLWOING STEPS, BLASTING INTO ONE END OF AN ELONGATED CYLINDRICAL REACTION CHAMBER A COMBUSTIBLE MIXTURE OF A FLUID HYDROCARBON FUEL AND AIR IN A DIRECTION SUBSTABTIALLY TANGENTIAL TO THE INNER WALL OF THE CHAMBER, BURNING THE COMBUSTIBLE MIXTURE WITHIN THE CHAMBER TO FORM A SWIRLING STREAM OF BLAST FLAME GASES PASSING THROUGH THE FURNACE CHAMBER AT A TEMPERATURE IN EXCESS OF THAT AT WHICH HYDROCARBONS ARE DECOMPOSED TO FORM CARBON BLACK, SEPARATELY AND FORCEFULLY INJECTING INTO THE SWIRLING GASES, AT A POINT DOWNSTREAM FROM THE POINT OF ENTRY OF THE COMBUSTIBLE MIXTURE TO THE CHAMBER AND IN A ZONE NEAR THE PERIPHERY OF THE SWIRLING GAS STREAM AND IN A SUBSTANTIALLY RADIAL DIRECTION, A STREAM OF HYDROCARBONS, AND THEREBY IMMEDIATELY SUBJECTING THE SAID STREAM OF HYDROCARBONS AS IT ENTERS THE FURNACE CHAMBER TO THE IMPACT AND SHEARING FORCES OF THE SWIRLING GAS STREAM, WHEREBY THE HYDROCARBONS THEREOF ARE RAPIDLY MIXED WITH THE BLAST FLAME GASES AND DECOMPOSED BY THE HEAT ABSORBED THEREFROM TO FORM CARBON BLACK IN SUSPENSION IN THE FURNACE GASES, COOLING THE SUSPENSION, AND SEPARATING AND RECOVERING THE CARBON BLACK THEREFROM.
Claim 2
Dependent Claim
193 words
THE PROCESS FOR PRODUCING CARBON BLACK COMPRISING IN COMBINATION THE FOLLWOING STEPS, BLASTING INTO ONE END OF AN ELONGATED CYLINDRICAL REACTION CHAMBER A COMBUSTIBLE MIXTURE OF A FLUID HYDROCARBON FUEL AND AIR IN A DIRECTION SUBSTABTIALLY TANGENTIAL TO THE INNER WALL OF THE CHAMBER, BURNING THE COMBUSTIBLE MIXTURE WITHIN THE CHAMBER TO FORM A SWIRLING STREAM OF BLAST FLAME GASES PASSING THROUGH THE FURNACE CHAMBER AT A TEMPERATURE IN EXCESS OF THAT AT WHICH HYDROCARBONS ARE DECOMPOSED TO FORM CARBON BLACK, SEPARATELY AND FORCEFULLY INJECTING INTO THE SWIRLING GASES, AT A POINT DOWNSTREAM FROM THE POINT OF ENTRY OF THE COMBUSTIBLE MIXTURE TO THE CHAMBER AND IN A ZONE NEAR THE PERIPHERY OF THE SWIRLING GAS STREAM AND IN A SUBSTANTIALLY RADIAL DIRECTION, A STREAM OF HYDROCARBONS, AND THEREBY IMMEDIATELY SUBJECTING THE SAID STREAM OF HYDROCARBONS AS IT ENTERS THE FURNACE CHAMBER TO THE IMPACT AND SHEARING FORCES OF THE SWIRLING GAS STREAM, WHEREBY THE HYDROCARBONS THEREOF ARE RAPIDLY MIXED WITH THE BLAST FLAME GASES AND DECOMPOSED BY THE HEAT ABSORBED THEREFROM TO FORM CARBON BLACK IN SUSPENSION IN THE FURNACE GASES, COOLING THE SUSPENSION, AND SEPARATING AND RECOVERING THE CARBON BLACK THEREFROM.
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) | 1955-06-10 | 1955-12-10 | 1956-06-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-06-10 | 1959-12-10 | 1960-06-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-06-10 | 1963-12-10 | 1964-06-10 | $7700.00 | Window Closed / Lapsed |