Patent US2973249A successfully refreshed from Google Patents.
US2973249A
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Carbon black process and apparatus
Assignee: Phillips Petroleum Co
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Filing: 1958-10-15
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Granted: 1961-02-28
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Expires: 1978-10-15
Abstract
No abstract record available.
Inventors
- 👤 Harold W Haas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 11:45
CPC Classifications
C; C09; C09C; C09C1/00; C09C1/44; C09C1/48; C09C1/56; C09C1/58; F; F26; F26B; F26B11/00; F26B11/02; F26B11/028; C01; C01P; C01P2004/00; C01P2004/50
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
107 words
A PROCESS FOR PRODUCING PELLETED CARBON BLACK COMPRISING SUBJECTING A FLUID CARBONACEOUS FUEL TO PARTIAL COMBUSTION WITH AIR TO PRODUCE HOT GASEOUS EFFLUENT CONTAINING CARBON BLACK, WATER-QUENCHING SAID HOT GASEOUS EFFLUENT TO A TEMPERATURE IN THE RANGE OF 500 TO 750* F., PASSING A FIRST PORTION OF THE QUENCHED EFFLUENT THRU A CARBON BLACK RECOVERY SYSTEM TO RECOVER CARBON BLACK THEREFROM, PELLETING RECOVERED BLACK IN ADMIXTURE WITH WATER TO PRODUCE WET PELLETS, PASSING SAID WET PELLETS THRU A ROTATING DRUM DRYER, PASSING A SECOND PORTION OF SAID QUENCHED EFFLUENT THRU SAID DRUM IN CONTACT WITH SAID WET PELLETS TO DRY SAME, PASSING A THIRD PORTION OF SAID
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) | 1964-02-28 | 1964-08-29 | 1965-02-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-02-28 | 1968-08-29 | 1969-02-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-02-28 | 1972-08-29 | 1973-02-28 | $7700.00 | Window Closed / Lapsed |