US2852345A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for production of carbon black
Assignee: Phillips Petroleum Co
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Filing: 1956-01-20
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Granted: 1958-09-16
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Expires: 1976-01-20
Abstract
No abstract record available.
Inventors
- 👤 Wilson H Rushford
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 23:26
CPC Classifications
C; C09; C09C; C09C1/00; C09C1/44; C09C1/48; C09C1/50
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
106 words
A PROCESS FOR PRODUCING CARBON BLACK WHICH COMPRISING INTRODUCING A FREE OXYGEN CONTAINING GAS TANGENTIALLY INTO A GENERALLY CYLINDRICAL FURNACE, INTRODUCING AXIALLY THROUGH AN INLET PIPE INTO SAID FURNACE A STREAM OF NORMALLY LIQUID VAPORIZED HYDROCARBON, INJECTING INTO SAID FURNACE AROUND SAID PIPE AND SAID HYDROCARBON A SHEATH OF GAS CONSISTING ESSENTIALLY OF HYDROGEN IN AN AMOUNT SUFFICIENT TO PREVENET THE DEPOSIT OF CARBONACEOUS MATERIAL ON SAID PIPE, BURNING SAID HYDROGEN WITH SAID FREE OXYGEN, FORMING CARBON BLACK FROM SAID VAPORIZED HYDROCARBON BY PYROCHEMICAL ACTION DUE TO THE HEAT OF SAID BURNING, AND SEPARATING THE RESULTING CARBON BLACK FROM THE RESULTING GASEOUS PRODUCTS OF SAID PROCESS.
References Cited (Backward Citations)
US2121463A
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US2153951A
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US2564700A
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US2694621A
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US2705189A
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US2772729A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-09-15 | 1962-03-17 | 1962-09-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-09-15 | 1966-03-17 | 1966-09-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-09-15 | 1970-03-17 | 1970-09-16 | $7700.00 | Window Closed / Lapsed |