US3213026A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for producing magnetic carbon black compositions
Assignee: Cabot Corp
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Filing: 1962-03-29
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Granted: 1965-10-19
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Expires: 1982-03-29
Abstract
No abstract record available.
Inventors
- 👤 Merrill E Jordan
- 👤 Harvey M Cole
- 👤 William G Burbine
- 👤 David L Petterson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 05:58
CPC Classifications
C; C09; C09C; C09C1/00; C09C1/44; C09C1/48; C09C1/56; H; H01; H01F; H01F1/00; H01F1/01; H01F1/03; H01F1/032; H01F1/04; H01F1/06; H01F1/065; C01; C01P; C01P2002/00; C01P2002/50; C01P2002/52; C01P2006/00; C01P2006/42
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
95 words
IN THE PROCESS FOR MAKING FURNACE CARBON BLACK, WHICH COMPRISES DECOMPOSING AN ESSENTIALLY HYDROCARBON RAW MATERIAL IN AN ENCLOSED CONVERSION ZONE MAINTAINED AT FREE CARBON FORMING CONDITIONS WITH THE AID OF A PARTIAL COMBUSTION REACTION PROCEEDING SIMULTANEOUSLY THEREIN, THE IMPROVEMENT WHICH COMPRISES SUPPLYING TO SAID CONVERSION ZONE A SALT OF AN ELEMENT CHOSEN FROM THE GROUP CONSISTING OF IRON, COBALT, NICKEL AND MIXTURES THEREOF, SAID SALT BEING SUPLIED TO SAID CONVERSION ZONE IN AN AMOUNT SUFFICIENT TO PROVIDE THERETO AT LEAST 200 PARTS OF THE SAID ELEMENT PER MILLION PARTS BY WEIGHT OF MAKE HYDROCARBON.
Claim 2
Dependent Claim
95 words
IN THE PROCESS FOR MAKING FURNACE CARBON BLACK, WHICH COMPRISES DECOMPOSING AN ESSENTIALLY HYDROCARBON RAW MATERIAL IN AN ENCLOSED CONVERSION ZONE MAINTAINED AT FREE CARBON FORMING CONDITIONS WITH THE AID OF A PARTIAL COMBUSTION REACTION PROCEEDING SIMULTANEOUSLY THEREIN, THE IMPROVEMENT WHICH COMPRISES SUPPLYING TO SAID CONVERSION ZONE A SALT OF AN ELEMENT CHOSEN FROM THE GROUP CONSISTING OF IRON, COBALT, NICKEL AND MIXTURES THEREOF, SAID SALT BEING SUPLIED TO SAID CONVERSION ZONE IN AN AMOUNT SUFFICIENT TO PROVIDE THERETO AT LEAST 200 PARTS OF THE SAID ELEMENT PER MILLION PARTS BY WEIGHT OF MAKE HYDROCARBON.
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) | 1968-10-18 | 1969-04-19 | 1969-10-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-10-18 | 1973-04-19 | 1973-10-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-10-18 | 1977-04-19 | 1977-10-19 | $7700.00 | Window Closed / Lapsed |