US3333928A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for manufacturing carbon black
Assignee: ASAHI KABON KK
•
Filing: 1963-07-05
•
Granted: 1967-08-01
•
Expires: 1983-07-05
Abstract
No abstract record available.
Inventors
- 👤 Kobayashi Wagi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 19:13
CPC Classifications
C; C09; C09C; C09C1/00; C09C1/44; C09C1/48; C09C1/50; C01; C01P; C01P2006/00; C01P2006/12; C01P2006/19
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
150 words
A PROCESS FOR MANUFACTURING CARBON BLACK COMPRISING STEPS OF INTRODUCING HYDROCARBONS TOGETHER WITH A FREE OXYGEN CONTAINING GAS UNDER PRESSURE INTO A CYLINDRICAL FIRST REACTION CHAMBER WHEREIN COMBUSTION OF THE HYDROCARBONS IS MAINTAINED IN AN INCOMPLETE STATE BY ADJUSTING THE AMOUNT OF GAS FED TO THE FIRST CHAMBER, FEEDING THE REACTANTS FROM THE CHAMBER INTO A FRUSTO-CONICAL CYLINDER WHICH IS COMMINICATED WITH THE FIRST CHAMBER AT THE BASE OF THE FRUSTO-CONICAL CYLINDER WHICH BASE IS OF LARGER DIAMETER THAN THAT OF THE FIRST CHAMBER SUCH THAT THE TEMPERATURE OF THE REACTANTS IS LOWERED BY THE EFFECT OF RAPID ADIABATIC EXPANSION, PASSING THE REACTANTS THROUGH THE REDUCED DIAMETER ZONE OF SAID FRUSTO-CONICAL CYLINDER WHEREBY THE TEMPERATURE OF SAID REACTANTS IS INCREASED BY COMPRESSION THEREOF TO COMPLETE THE CARBONIZATION REACTION, AND DRAWING OUT THE RESULTING PRODUCTS THROUGH A SMALL DIAMETER CONDUIT, ONE END OF WHICH IS PROJECTED INTO SAID REDUCED DIAMETER ZONE.
Claim 2
Dependent Claim
150 words
A PROCESS FOR MANUFACTURING CARBON BLACK COMPRISING STEPS OF INTRODUCING HYDROCARBONS TOGETHER WITH A FREE OXYGEN CONTAINING GAS UNDER PRESSURE INTO A CYLINDRICAL FIRST REACTION CHAMBER WHEREIN COMBUSTION OF THE HYDROCARBONS IS MAINTAINED IN AN INCOMPLETE STATE BY ADJUSTING THE AMOUNT OF GAS FED TO THE FIRST CHAMBER, FEEDING THE REACTANTS FROM THE CHAMBER INTO A FRUSTO-CONICAL CYLINDER WHICH IS COMMINICATED WITH THE FIRST CHAMBER AT THE BASE OF THE FRUSTO-CONICAL CYLINDER WHICH BASE IS OF LARGER DIAMETER THAN THAT OF THE FIRST CHAMBER SUCH THAT THE TEMPERATURE OF THE REACTANTS IS LOWERED BY THE EFFECT OF RAPID ADIABATIC EXPANSION, PASSING THE REACTANTS THROUGH THE REDUCED DIAMETER ZONE OF SAID FRUSTO-CONICAL CYLINDER WHEREBY THE TEMPERATURE OF SAID REACTANTS IS INCREASED BY COMPRESSION THEREOF TO COMPLETE THE CARBONIZATION REACTION, AND DRAWING OUT THE RESULTING PRODUCTS THROUGH A SMALL DIAMETER CONDUIT, ONE END OF WHICH IS PROJECTED INTO SAID REDUCED DIAMETER ZONE.
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) | 1970-07-31 | 1971-01-30 | 1971-08-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-07-31 | 1975-01-30 | 1975-08-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-07-31 | 1979-01-30 | 1979-08-01 | $7700.00 | Window Closed / Lapsed |