US2641535A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Treatment of furnace blacks
Assignee: Phillips Petroleum Co
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Filing: 1949-04-14
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Granted: 1953-06-09
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Expires: 1969-04-14
Abstract
No abstract record available.
Inventors
- 👤 Martin R Cines
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 01:01
CPC Classifications
C; C09; C09C; C09C1/00; C09C1/44; C09C1/48; C09C1/56
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
110 words
A PROCESS FOR TREATING HIGH PH FURNACE CARBON BLACK WHICH COMPRISES: INTRODUCING SAID CARBON BLACK INTO A DRY PELLETING ZONE; CONTACTING SAID CARBON BLACK WITH A FREE OXYGEN-CONTAINING GAS CONTAINING, AS AN ADDED CONSTITUTENT, SULFUR DIOXIDE IN AN AMOUNT OF FROM 0.01 TO 5 PER CENT BY VOLUME AT A RATE OF FROM 5 TO 50 CUBIC FEET OF SAID AIR PER POUND OF CARBON BLACK INTRODUCED AT A TEMPERATURE OF AT LEAST 32* F.; PELLETING SAID CARBON BLACK WITHIN SAID PELLETING ZONE; REMOVING FROM SAID PELLETING ZONE RESULTING CARBON BLACK PELLETS HAVING A PH OF FROM 3 TO 7; AND WITHDRAWING A RESULTING GAS STREAM FROM SAID PELLETING ZONE.
Claim 2
Dependent Claim
110 words
A PROCESS FOR TREATING HIGH PH FURNACE CARBON BLACK WHICH COMPRISES: INTRODUCING SAID CARBON BLACK INTO A DRY PELLETING ZONE; CONTACTING SAID CARBON BLACK WITH A FREE OXYGEN-CONTAINING GAS CONTAINING, AS AN ADDED CONSTITUTENT, SULFUR DIOXIDE IN AN AMOUNT OF FROM 0.01 TO 5 PER CENT BY VOLUME AT A RATE OF FROM 5 TO 50 CUBIC FEET OF SAID AIR PER POUND OF CARBON BLACK INTRODUCED AT A TEMPERATURE OF AT LEAST 32* F.; PELLETING SAID CARBON BLACK WITHIN SAID PELLETING ZONE; REMOVING FROM SAID PELLETING ZONE RESULTING CARBON BLACK PELLETS HAVING A PH OF FROM 3 TO 7; AND WITHDRAWING A RESULTING GAS STREAM FROM SAID PELLETING ZONE.
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) | 1956-06-08 | 1956-12-08 | 1957-06-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-06-08 | 1960-12-08 | 1961-06-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-06-08 | 1964-12-08 | 1965-06-09 | $7700.00 | Window Closed / Lapsed |