US2636831A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Colloidal sulfur process
Assignee: Phillips Petroleum Co
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Filing: 1949-10-21
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Granted: 1953-04-28
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Expires: 1969-10-21
Abstract
No abstract record available.
Inventors
- 👤 Samuel C Carney
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 02:06
CPC Classifications
C; C01; C01B; C01B17/00; C01B17/02; C01B17/04; C01B17/0404; C01B17/046; C01B17/0469
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
84 words
IN A PROCESS FOR PRODUCING CARBON BLACK PELLETS WHEREIN FLOCCULENT CARBON BLACK IS INTRODUCED TO THE INLET END OF A CARBON BLACK PELLETING MILL AND WHEREIN CARBON BLACK PELLETS ARE WITHDRAWN FROM THE OUTLET END OF SAID PELLETING MILL, THE IMPROVEMENT WHICH COMPRISES OXIDIZING HYDROGEN SULFIDE WITH AN OXYGEN-CONTAINING GAS IN THE PRESENCE OF CARBON BLACK IN SAID PELLETING MILL AT A TEMPERATURE WITHIN THE RANGE OF 200 TO 1200* F., AND WITHDRAWING FROM SAID PELLETING MILL CARBON BLACK PELLETS CONTAINING DEPOSITED COLLOIDAL SULFUR.
References Cited (Backward Citations)
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Cited
US1999573A
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US1984971A
Cited
US2043084A
Cited
US2316201A
Cited
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Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-04-27 | 1956-10-27 | 1957-04-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-04-27 | 1960-10-27 | 1961-04-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-04-27 | 1964-10-27 | 1965-04-28 | $7700.00 | Window Closed / Lapsed |