US2652344A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Carbon black pelleting
Assignee: Phillips Petroleum Co
•
Filing: 1949-04-01
•
Granted: 1953-09-15
•
Expires: 1969-04-01
Abstract
No abstract record available.
Inventors
- 👤 Russell K Simms
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 04:55
CPC Classifications
C; C09; C09C; C09C1/00; C09C1/44; C09C1/48; C09C1/56; C09C1/60
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
119 words
A METHOD FOR THE PRODUCTION OF AN IMPROVED CARBON BLACK PELLET PRODUCT COMPRISING REACTING HYDROGEN SULFIDE AND SULFUR DIOXIDE IN THE PRESENCE OF BAUXITE AS A CATALYST AT A TEMPERATURE BETWEEN THE LIMITS OF 400* F. TO 600* F. TO FORM VAPOROUS ELEMENTARY SULFUR ADDING TO A STREAM OF CARBON BLACK IN GASEOUS SUSPENSION FROM 0.05 PER CENT TO 10 PER CENT BY WEIGHT OF SAID VAPOROUS ELEMENTARY SULFUR BASED ON THE WEIGHT OF THE CARBON BLACK, SEPARATING AN ADMIXTURE OF CARBON BLACK AND SULFUR TO CARBON BLACK DRY PELLETING GASES AND SUBJECTING THIS ADMIXTURE OF CARBON BLACK AND SULFUR TO CARBON BLACK DRY PELLETING CONDITIONS AT A TEMPERATURE ABOVE 175* F. AND BELOW THE MELTING POINT OF SULFUR.
Claim 2
Independent Claim
119 words
A METHOD FOR THE PRODUCTION OF AN IMPROVED CARBON BLACK PELLET PRODUCT COMPRISING REACTING HYDROGEN SULFIDE AND SULFUR DIOXIDE IN THE PRESENCE OF BAUXITE AS A CATALYST AT A TEMPERATURE BETWEEN THE LIMITS OF 400* F. TO 600* F. TO FORM VAPOROUS ELEMENTARY SULFUR ADDING TO A STREAM OF CARBON BLACK IN GASEOUS SUSPENSION FROM 0.05 PER CENT TO 10 PER CENT BY WEIGHT OF SAID VAPOROUS ELEMENTARY SULFUR BASED ON THE WEIGHT OF THE CARBON BLACK, SEPARATING AN ADMIXTURE OF CARBON BLACK AND SULFUR TO CARBON BLACK DRY PELLETING GASES AND SUBJECTING THIS ADMIXTURE OF CARBON BLACK AND SULFUR TO CARBON BLACK DRY PELLETING CONDITIONS AT A TEMPERATURE ABOVE 175* F. AND BELOW THE MELTING POINT OF SULFUR.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-09-14 | 1957-03-16 | 1957-09-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-09-14 | 1961-03-16 | 1961-09-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-09-14 | 1965-03-16 | 1965-09-15 | $7700.00 | Window Closed / Lapsed |