Patent US2758666A successfully refreshed from Google Patents.
US2758666A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Carbon black separation
Assignee: Phillips Petroleum Co
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Filing: 1952-04-10
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Granted: 1956-08-14
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Expires: 1972-04-10
Abstract
No abstract record available.
Inventors
- 👤 Spencer S Prentiss
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 19:20
CPC Classifications
C; C09; C09C; C09C1/00; C09C1/44; C09C1/48; C09C1/56; C09C1/60; Y; Y10; Y10S; Y10S55/00; Y10S55/25
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
53 words
A PROCESS FOR AGGLOMERATING CARBON BLACK COMPRISING DIVIDING A SUSPENSION OF CARBON BLACK PARTICLES IN A GAS INTO TWO PORTIONS, ELECTROSTATICALLY CHARGING THE CARBON BLACK PARTICLES OF ONLY ONE PORTION, COMBINING THE CHARGED PORTION WITH THE PORTION TO WHICH NO CHARGE IS ADDED AND RECOVERING ONLY THE CARBON BLACK FROM THE RECOMBINED STREAM.
Claim 2
Dependent Claim
53 words
A PROCESS FOR AGGLOMERATING CARBON BLACK COMPRISING DIVIDING A SUSPENSION OF CARBON BLACK PARTICLES IN A GAS INTO TWO PORTIONS, ELECTROSTATICALLY CHARGING THE CARBON BLACK PARTICLES OF ONLY ONE PORTION, COMBINING THE CHARGED PORTION WITH THE PORTION TO WHICH NO CHARGE IS ADDED AND RECOVERING ONLY THE CARBON BLACK FROM THE RECOMBINED STREAM.
Claim 3
Independent Claim
124 words
AN APPARATUS FOR AGGLOMERATING CARBON BLACK COMPRISING, IN COMBINATION A VESSEL, A LINING OF CERAMIC ELECTRICAL INSULATING MATERIAL ON THE WALLS OF SAID VESSEL, AN INLET CONDUIT TO SAID VESSEL, AN OUTLET CONDUIT FROM SAID VESSEL, A LINING OF CERAMIC ELECTRICAL INSULATING MATERIAL AROUND THE INNER WALLS OF SAID OUTLET CONDUIT, AN ELECTRICAL CONDUCTOR EXTENDING THROUGH THE WALL OF SAID VESSEL AND BEING ADAPTED TO PROVIDE AN ELECTROSTATIC FIELD OF ONLY ONE POLARITY WITH RESPECT TO THE GROUND IN SAID VESSEL, AND THROUGH SAID LINING, A DISCHARGE ELECTRODE ONLY IN SAID VESSEL, SAID DISCHARGE ELECTRODE BEING IN ELECTRICAL CONTACT WITH SAID CONDUCTOR, SAID CONDUCTOR AND SAID DISCHARGE ELECTRODE A SOURCE OF HIGH POTENTIAL ELECTRIC CURRENT OF SAID ONE POLARITY CONNECTED WITH SAID ELECTRICAL CONDUCTOR.
Claim 4
Independent Claim
124 words
AN APPARATUS FOR AGGLOMERATING CARBON BLACK COMPRISING, IN COMBINATION A VESSEL, A LINING OF CERAMIC ELECTRICAL INSULATING MATERIAL ON THE WALLS OF SAID VESSEL, AN INLET CONDUIT TO SAID VESSEL, AN OUTLET CONDUIT FROM SAID VESSEL, A LINING OF CERAMIC ELECTRICAL INSULATING MATERIAL AROUND THE INNER WALLS OF SAID OUTLET CONDUIT, AN ELECTRICAL CONDUCTOR EXTENDING THROUGH THE WALL OF SAID VESSEL AND BEING ADAPTED TO PROVIDE AN ELECTROSTATIC FIELD OF ONLY ONE POLARITY WITH RESPECT TO THE GROUND IN SAID VESSEL, AND THROUGH SAID LINING, A DISCHARGE ELECTRODE ONLY IN SAID VESSEL, SAID DISCHARGE ELECTRODE BEING IN ELECTRICAL CONTACT WITH SAID CONDUCTOR, SAID CONDUCTOR AND SAID DISCHARGE ELECTRODE A SOURCE OF HIGH POTENTIAL ELECTRIC CURRENT OF SAID ONE POLARITY CONNECTED WITH SAID ELECTRICAL CONDUCTOR.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-08-14 | 1960-02-13 | 1960-08-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-08-14 | 1964-02-13 | 1964-08-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-08-14 | 1968-02-13 | 1968-08-14 | $7700.00 | Window Closed / Lapsed |