US3306761A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Controlled partial oxidation of carbon black with ammonium nitrate, preferably in the presence of ammonium, alkali metal, and alkaline earth metal halides
Assignee: Phillips Petroleum Co
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Filing: 1963-04-26
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Granted: 1967-02-28
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Expires: 1983-04-26
Abstract
No abstract record available.
Inventors
- 👤 Marvin M Johnson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 01:43
CPC Classifications
C; C09; C09C; C09C1/00; C09C1/44; C09C1/48; C09C1/56; C09C1/565; C08; C08K; C08K3/00; C08K3/02; C08K3/04; C01; C01P; C01P2006/00; C01P2006/12; C01P2006/19
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
78 words
THE PROCESS OF REDUCING THE PH OF A FURNANCE CARBON BLACK HAVING AN ALKALINE PH ABOVE 7 TO AN ACID PH BELOW 7 BY MIXING THE ORIGINAL CARBON BLACK WITH A MINOR PROPORTION OF FROM 1 TO 25 WEIGHT PERCENT BASED ON THE CARBON BLACK OF AMMONIUM NITRATE AND HEATING THE MIXTURE TO ABOUT 155 TO 400*C. FOR A PERIOD OF TIME OF 0.01 MINUTE TO 24 HOURS SUFFICIENT TO CAUSE THE PARTIAL OXIDATION OF SAID CARBON BLACK.
Claim 2
Dependent Claim
78 words
THE PROCESS OF REDUCING THE PH OF A FURNANCE CARBON BLACK HAVING AN ALKALINE PH ABOVE 7 TO AN ACID PH BELOW 7 BY MIXING THE ORIGINAL CARBON BLACK WITH A MINOR PROPORTION OF FROM 1 TO 25 WEIGHT PERCENT BASED ON THE CARBON BLACK OF AMMONIUM NITRATE AND HEATING THE MIXTURE TO ABOUT 155 TO 400*C. FOR A PERIOD OF TIME OF 0.01 MINUTE TO 24 HOURS SUFFICIENT TO CAUSE THE PARTIAL OXIDATION OF SAID CARBON BLACK.
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) | 1970-02-27 | 1970-08-29 | 1971-02-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-02-27 | 1974-08-29 | 1975-02-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-02-27 | 1978-08-29 | 1979-02-28 | $7700.00 | Window Closed / Lapsed |