US3681031A
Expired / Lapsed
US
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Carbon black reactor
Assignee: Phillips Petroleum Co
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Filing: 1969-06-05
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Granted: 1972-08-01
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Expires: 1989-06-05
Abstract
Abstract A METHOD AND APPARATUS FOR INTRODUCING COMBUSTION GASES INTO A CARBON BLACK FURNACE, THE METHOD INVOLVING THE INTRODUCTION OF THE COMBUSTION GASES AT VARIABLE VELOCITIES TO AFFECT THE EXTENT OF THE INTERACTION BETWEEN THE AXIALLY-INTRODUCED REACTANTS AND THE COMBUSTION GASES. THE APPARATUS INCLUDES MEANS FOR VARYING THE INTRODUCTION VELOCITY OF THE COMBUSTION GASES.
Inventors
- 👤 Paul H Johnson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 15:55
CPC Classifications
C; C09; C09C; C09C1/00; C09C1/44; C09C1/48; C09C1/50; B; B01; B01J; B01J19/00
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) | 1975-08-01 | 1976-01-31 | 1976-08-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-01 | 1980-01-31 | 1980-08-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-01 | 1984-01-31 | 1984-08-01 | $7700.00 | Window Closed / Lapsed |