US3279935A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Oxidation of carbon black
Assignee: Ashland LLC
•
Filing: 1963-06-11
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Granted: 1966-10-18
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Expires: 1983-06-11
Abstract
No abstract record available.
Inventors
- 👤 Alton E Daniell
- 👤 William R Peterson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 13:29
CPC Classifications
C; C09; C09C; C09C1/00; C09C1/44; C09C1/48; C09C1/56; C09C1/565; C01; C01P; C01P2006/00; C01P2006/80
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
111 words
A PROCESS FOR OXIDIZING A FINELY DIVIDED CARBON BLACK HAVING AN ALKALINE PH CHARACTERISTIC WHICH COMPRISES: PASSING A PREHEATED STREAM OF A GASEOUS OXIDIZING MIXTURE COMPRISING ABOUT 10-40% BY VOLUME OF OXYGEN, ABOUT 1.0-25% BY VOLUME OF HYDROGEN PEROXIDE, AND AT LEAST A TRACE OF WATER VAPOR THROUGH A BODY OF SAID CARBON BLACK WHEREBY SAID BODY OF CARBON BLACK IS FLUIDIZED BY SAID STREAM AND SUBJECTED TO THE OXIDIZING ACTION THEREOF, THE PREHEAT TEMPERATURE OF SAID STREAM BEING SUCH AS TO MAINTAIN SAID CARBON BLACK AT A TEMPERATURE OF 350-600*F. AND THE VOLUME OF SAID STREAM BEING SUFFICIENT TO REDUCE THE PH CHARACTERISTIC OF SAID CARBON BLACK TO ABOUT 2.0-3.5.
Claim 2
Dependent Claim
111 words
A PROCESS FOR OXIDIZING A FINELY DIVIDED CARBON BLACK HAVING AN ALKALINE PH CHARACTERISTIC WHICH COMPRISES: PASSING A PREHEATED STREAM OF A GASEOUS OXIDIZING MIXTURE COMPRISING ABOUT 10-40% BY VOLUME OF OXYGEN, ABOUT 1.0-25% BY VOLUME OF HYDROGEN PEROXIDE, AND AT LEAST A TRACE OF WATER VAPOR THROUGH A BODY OF SAID CARBON BLACK WHEREBY SAID BODY OF CARBON BLACK IS FLUIDIZED BY SAID STREAM AND SUBJECTED TO THE OXIDIZING ACTION THEREOF, THE PREHEAT TEMPERATURE OF SAID STREAM BEING SUCH AS TO MAINTAIN SAID CARBON BLACK AT A TEMPERATURE OF 350-600*F. AND THE VOLUME OF SAID STREAM BEING SUFFICIENT TO REDUCE THE PH CHARACTERISTIC OF SAID CARBON BLACK TO ABOUT 2.0-3.5.
References Cited (Backward Citations)
US2707674A
Cited
US3023118A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-10-17 | 1970-04-18 | 1970-10-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-10-17 | 1974-04-18 | 1974-10-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-10-17 | 1978-04-18 | 1978-10-18 | $7700.00 | Window Closed / Lapsed |