US2641534A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Carbon black furnace and process for making carbon black
Assignee: Phillips Petroleum Co
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Filing: 1950-12-14
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Granted: 1953-06-09
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Expires: 1970-12-14
Abstract
No abstract record available.
Inventors
- 👤 Joseph C Krejci
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 23:54
CPC Classifications
C; C09; C09C; C09C1/00; C09C1/44; C09C1/48; C09C1/50
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
124 words
A CARBON BLACK FURNACE COMPRISING IN COMBINATION A FIRST CYLINDRICAL CHAMBER OF GREATER DIAMETER THAN LENGTH AND A SECOND CYCLINDRICAL COAXIAL CHAMBER OF LESSER DIAMETER COMMUNICATING THEREWITH, SAID SECOND CHAMBER BEING OF GREATER LENGTH THAN DIAMETER, A HYDROCARBON INJECTOR DISPOSED TO DISCHARGE A STREAM OF HYDROCARBONS PREDOMINATELY AXIALLY INTO SAID FIRST CHAMBER, AND A FUEL BURNER DISPOSED OF DISCHARGE HOT GASES INTO SAID FIRST CHAMBER, SAID FUEL BURNER COMPRISING A BODY COMPRISING A FIRST CYLINDRICAL PIPE OF GREATER DIAMETER THAN LENGTH AND A SECOND CYLINDRICAL PIPE OF LESSER DIAMETER COMMUNICATING THEREWITH, SAID SECOND PIPE BEING OF GREATER LENGTH THAN DIAMETER AND HAVING AN OPEN OUTLET END COMMUNICATING WITH SAID FIRST CHAMBER WITH THE LONGITUDINAL AXIS OF SAID SECOND PIPE DISPOSED PREDOMINATELY TANGENT TO THE
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) | 1956-06-08 | 1956-12-08 | 1957-06-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-06-08 | 1960-12-08 | 1961-06-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-06-08 | 1964-12-08 | 1965-06-09 | $7700.00 | Window Closed / Lapsed |