Patent US2985511A successfully refreshed from Google Patents.
US2985511A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Carbon black manufacture
Assignee: Columbian Carbon Co
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Filing: 1958-09-29
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Granted: 1961-05-23
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Expires: 1978-09-29
Abstract
No abstract record available.
Inventors
- 👤 Jr John Savage Norris
- 👤 Noone George James
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 13:37
CPC Classifications
C; C09; C09C; C09C1/00; C09C1/44; C09C1/48; C09C1/50; C01; C01P; C01P2006/00; C01P2006/19
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
166 words
IN THE PROCESS FOR PRODUCING CARBON BLACK BY THE DECOMPOSITION OF A HYDROCARBON MAKE IN WHICH A TURBULENT SWIRLING BODY OF HOT OXIDIZING BLAST FLAME GASES IS CAUSED TO PASS LONGITUDINALLY THROUGH AN ELONGATED, CYLINDRICAL REACTION CHAMBER AT A TEMPERATURE IN EXCESS OF THAT AT WHICH THE HYDROCARBON IS DECOMPOSED TO FORM CARBON BLACK, AND A LIQUID HYDROCARBON MAKE TO BE DECOMPOSED TO CARBON BLACK IS INJECTED AS A LIQUID SPRAY INTO THE SWIRLING GASES AT AN INTERMEDIATE POINT ALONG THE PATH OF THE HOT GASES THROUGH THE CHAMBER, THE HYDROCARBON IS DECOMPOSED BY HEAT ABSORBED FROM HOT GASES TO FORM CARBON BLACK AND THE CARBON BLACK IS SEPARATED FROM THE FURNACE EFFLUENT GASES, THE METHOD OF INDEPENDENTLY ALTERING THE OIL ABSORPTION CHARACTERISTICS OF THE BLACK WITHOUT SUBSTANTIAL CHANGE IN PARTICLE SIZE COMPRISING SEPARATELY INJECTING A NORMALLY GASEOUS PARAFFINIC HYDROCARBON INTO THE HOT GAS STREAM IN THAT ZONE OF THE FURNACE CHAMBER INTO WHICH THE LIQUID HYDROCARBON IS SIMULTANEOUSLY INTRODUCED AND IN WHICH THE PYROLYSIS OF
Claim 2
Dependent Claim
166 words
IN THE PROCESS FOR PRODUCING CARBON BLACK BY THE DECOMPOSITION OF A HYDROCARBON MAKE IN WHICH A TURBULENT SWIRLING BODY OF HOT OXIDIZING BLAST FLAME GASES IS CAUSED TO PASS LONGITUDINALLY THROUGH AN ELONGATED, CYLINDRICAL REACTION CHAMBER AT A TEMPERATURE IN EXCESS OF THAT AT WHICH THE HYDROCARBON IS DECOMPOSED TO FORM CARBON BLACK, AND A LIQUID HYDROCARBON MAKE TO BE DECOMPOSED TO CARBON BLACK IS INJECTED AS A LIQUID SPRAY INTO THE SWIRLING GASES AT AN INTERMEDIATE POINT ALONG THE PATH OF THE HOT GASES THROUGH THE CHAMBER, THE HYDROCARBON IS DECOMPOSED BY HEAT ABSORBED FROM HOT GASES TO FORM CARBON BLACK AND THE CARBON BLACK IS SEPARATED FROM THE FURNACE EFFLUENT GASES, THE METHOD OF INDEPENDENTLY ALTERING THE OIL ABSORPTION CHARACTERISTICS OF THE BLACK WITHOUT SUBSTANTIAL CHANGE IN PARTICLE SIZE COMPRISING SEPARATELY INJECTING A NORMALLY GASEOUS PARAFFINIC HYDROCARBON INTO THE HOT GAS STREAM IN THAT ZONE OF THE FURNACE CHAMBER INTO WHICH THE LIQUID HYDROCARBON IS SIMULTANEOUSLY INTRODUCED AND IN WHICH THE PYROLYSIS OF
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) | 1964-05-22 | 1964-11-21 | 1965-05-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-05-22 | 1968-11-21 | 1969-05-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-05-22 | 1972-11-21 | 1973-05-23 | $7700.00 | Window Closed / Lapsed |