Patent US3701827A successfully refreshed from Google Patents.
US3701827A
Expired / Lapsed
US
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Process and apparatus for the production of large particle-size,low structure carbon black
Assignee: Continental Carbon Co
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Filing: 1971-07-13
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Granted: 1972-10-31
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Expires: 1991-07-13
Abstract
Abstract LARGE PARTICLE-SIZE, LOW STRUCTURE CARBON BLACK RESEMBLING THERMAL BLACK IS PRODUCED BY A PROCESS AND APPARATUS INVOLVING TWO STAGES OF INTRODUCTION OF HYDROCARBON OIL FEEDSTOCK. THE FIRST STAGE INVOLVES THE INTRODUCTION OF A MINOR PORTION OF THE TOTAL FEEDSTOCK AXIALLY INTO A TUBULAR REACTOR SECTION, THE REACTION PRODUCTS FROM WHICH PASS INTO AN ENLARGED-DIAMETER SECTION INTO WHICH THE MAJOR PORTION OF THE FEEDSTOCK IS INTRODUCED RADIALLY IN A DOWNSTREAM ANGLE THROUGH A PLURALITY OF NOZZLES. THE FIRST-STAGE FEEDSTOCK IS HEATED BY HOT COMBUSTION GASES, AND SUPPLEMENTARY HEAT IS ADDED TO THE ENLARGED-DIAMETER SECTION AT A PLURALITY OF LOCATIONS ALONG THAT SECTION.
Inventors
- 👤 Karel R Dahmen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 18:45
CPC Classifications
C; C09; C09C; C09C1/00; C09C1/44; C09C1/48; C09C1/50; C01; C01P; C01P2004/00; C01P2004/50
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-10-31 | 1976-05-01 | 1976-10-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-10-31 | 1980-05-01 | 1980-10-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-10-31 | 1984-05-01 | 1984-10-31 | $7700.00 | Window Closed / Lapsed |