Patent US3235334A successfully refreshed from Google Patents.
US3235334A
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US
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Process and apparatus for carbon black production
Assignee: Phillips Petroleum Co
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Filing: 1962-06-11
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Granted: 1966-02-15
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Expires: 1982-06-11
Abstract
No abstract record available.
Inventors
- 👤 Carl J Helmers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 22:31
CPC Classifications
C; C09; C09C; C09C1/00; C09C1/44; C09C1/48; C09C1/50; C01; C01P; C01P2006/00; C01P2006/80
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
137 words
A PROCESS FOR PRODUCING CARBON BLACK, WHICH COMPRISES: CONTINUOUSLY INTRODUCING A HYDROCARBON REACTANT INTO A FIRST PORTION OF A REACTION ZONE; MAINTAINING A NONOXIDIZING ATMOSPHERE AROUND SAID REACTANT IN SAID FIRST PORTION; CONTINUOUSLY INTRODUCING AN OXIDIZING GAS INTO SAID REACTION ZONE AT A BOUNDARY LOCATION DOWNSTREAM OF THE LOCATION OF INTRODUCTION OF SAID REACTANT, THEREBY DELIMITING SAID FIRST PORTION OF SAID ZONE UPSTREAM OF SAID BOUNDARY LOCATION AND A SECOND PORTION DOWNSTREAM OF SAID BOUNDARY LOCATION; CONVERTING SAID REACTANT TO CARBON BLACK IN SAID FIRST AND SAID SECOND PORTIONS OF SAID ZONE, BETWEEN 20 AND 80 PERCENT OF THE TOTAL CONVERSION TO CARBON BLACK OCCURRING IN SAID FIRST PORTION AND BETWEEN 80 AND 20 PERCENT OF THE CONVERSION TO CARBON BLACK OCCURRING IN SAID SECOND PORTION; AND RECOVERING SAID CARBON BLACK BY SEPARATION FROM SAID GASEOUS PRODUCTS.
Claim 2
Dependent Claim
137 words
A PROCESS FOR PRODUCING CARBON BLACK, WHICH COMPRISES: CONTINUOUSLY INTRODUCING A HYDROCARBON REACTANT INTO A FIRST PORTION OF A REACTION ZONE; MAINTAINING A NONOXIDIZING ATMOSPHERE AROUND SAID REACTANT IN SAID FIRST PORTION; CONTINUOUSLY INTRODUCING AN OXIDIZING GAS INTO SAID REACTION ZONE AT A BOUNDARY LOCATION DOWNSTREAM OF THE LOCATION OF INTRODUCTION OF SAID REACTANT, THEREBY DELIMITING SAID FIRST PORTION OF SAID ZONE UPSTREAM OF SAID BOUNDARY LOCATION AND A SECOND PORTION DOWNSTREAM OF SAID BOUNDARY LOCATION; CONVERTING SAID REACTANT TO CARBON BLACK IN SAID FIRST AND SAID SECOND PORTIONS OF SAID ZONE, BETWEEN 20 AND 80 PERCENT OF THE TOTAL CONVERSION TO CARBON BLACK OCCURRING IN SAID FIRST PORTION AND BETWEEN 80 AND 20 PERCENT OF THE CONVERSION TO CARBON BLACK OCCURRING IN SAID SECOND PORTION; AND RECOVERING SAID CARBON BLACK BY SEPARATION FROM SAID GASEOUS PRODUCTS.
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) | 1969-02-14 | 1969-08-16 | 1970-02-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-02-14 | 1973-08-16 | 1974-02-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-02-14 | 1977-08-16 | 1978-02-15 | $7700.00 | Window Closed / Lapsed |