Patent US2768067A successfully refreshed from Google Patents.
US2768067A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Manufacture of carbon black
Assignee: Columbian Carbon Co
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Filing: 1952-04-19
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Granted: 1956-10-23
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Expires: 1972-04-19
Abstract
No abstract record available.
Inventors
- 👤 George L Heller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 17:50
CPC Classifications
C; C09; C09C; C09C1/00; C09C1/44; C09C1/48; C09C1/50
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
177 words
IN THE PROCESS OF PRODUCING CARBON BLACK BY WHICH A COMBUSTIBLE MIXTURE OF A FLUID HYDROCARBON FUEL AND AN OXYGEN-CONTAINING GAS IS BLASTED INTO ONE END OF AN ELONGATED CYLINDRICAL REACTION CHAMBER IN A DIRECTION SUBSTANTIALLY TANGENTIAL TO THE CHAMBER AND BURNED THEREIN TO FORM A TURBULENT SWIRLING BODY OF OXIDIZING BLAST FLAME GASES PASSING LONGITUDINALLY THROUGH THE CHAMBER AT A TEMPERATURE IN EXCESS OF THAT AT WHICH HYDROCARBONS ARE DECOMPOSED TO FORM CARBON BLACK AND A NORMALLY LIQUID HYDROCARBON TO BE DECOMPOSED IS SEPARATELY INJECTED INTO THE SWIRLING GASES AT A POINT DOWNSTREAM FROM THE ENTRY OF SAID GASES TO THE CHAMBER AND IS DECOMPOSED BY HEAT ABSORBED FROM THE HOT GASES TO FORM CARBON PARTICLES IN SUSPENSION, THE STEP OF SEPARATELY MIXING A NORMALLY GASEOUS HYDROCARBON WITH THE TURBULENT SUSPENSION WHILE THE LATTER IS AT A TEMPERATURE IN EXCESS OF THAT AT WHICH THE GASEOUS HYDROCARBON IS DECOMPOSED TO FORM CARBON BLACK, THE PROPORTION OF GASEOUS HYDROCARBON THUS MIXED WITH THE SUSPENSION NOT EXCEEDING 25% BY WEIGHT OF THE INITIALLY INJECTED HYDROCARBON TO BE DECOMPOSED.
Claim 2
Dependent Claim
177 words
IN THE PROCESS OF PRODUCING CARBON BLACK BY WHICH A COMBUSTIBLE MIXTURE OF A FLUID HYDROCARBON FUEL AND AN OXYGEN-CONTAINING GAS IS BLASTED INTO ONE END OF AN ELONGATED CYLINDRICAL REACTION CHAMBER IN A DIRECTION SUBSTANTIALLY TANGENTIAL TO THE CHAMBER AND BURNED THEREIN TO FORM A TURBULENT SWIRLING BODY OF OXIDIZING BLAST FLAME GASES PASSING LONGITUDINALLY THROUGH THE CHAMBER AT A TEMPERATURE IN EXCESS OF THAT AT WHICH HYDROCARBONS ARE DECOMPOSED TO FORM CARBON BLACK AND A NORMALLY LIQUID HYDROCARBON TO BE DECOMPOSED IS SEPARATELY INJECTED INTO THE SWIRLING GASES AT A POINT DOWNSTREAM FROM THE ENTRY OF SAID GASES TO THE CHAMBER AND IS DECOMPOSED BY HEAT ABSORBED FROM THE HOT GASES TO FORM CARBON PARTICLES IN SUSPENSION, THE STEP OF SEPARATELY MIXING A NORMALLY GASEOUS HYDROCARBON WITH THE TURBULENT SUSPENSION WHILE THE LATTER IS AT A TEMPERATURE IN EXCESS OF THAT AT WHICH THE GASEOUS HYDROCARBON IS DECOMPOSED TO FORM CARBON BLACK, THE PROPORTION OF GASEOUS HYDROCARBON THUS MIXED WITH THE SUSPENSION NOT EXCEEDING 25% BY WEIGHT OF THE INITIALLY INJECTED HYDROCARBON TO BE DECOMPOSED.
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) | 1959-10-23 | 1960-04-23 | 1960-10-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-10-23 | 1964-04-23 | 1964-10-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-10-23 | 1968-04-23 | 1968-10-23 | $7700.00 | Window Closed / Lapsed |