Patent US3582277A successfully refreshed from Google Patents.
US3582277A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for carbon black production
Assignee: Phillips Petroleum Co
•
Filing: 1968-06-27
•
Granted: 1971-06-01
•
Expires: 1988-06-27
Abstract
Abstract PROCESS AND APPARATUS FOR THE PRODUCTION OF CARBON BLACK WHEREIN A HYDROCARBON FEED ID CONTACTED WITH TWO GENERALLY COUNTERCURRENT IMPINGING MASSES OF OT COMBUSTION GASES AND THE RESULTING MIXTURES PASSED INTO A REACTION ZONE WHEREIN THE HYDROCARBON FEED IS PYROLYTICALLY DECOMPOSED INTO CARBON BLACK.
Inventors
- 👤 Gerard Kraus
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 15:51
CPC Classifications
C; C09; C09C; C09C1/00; C09C1/44; C09C1/48; C09C1/50; C01; C01P; C01P2006/00; C01P2006/12; C01P2006/19
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-05-31 | 1974-11-30 | 1975-06-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-05-31 | 1978-11-30 | 1979-06-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-05-31 | 1982-11-30 | 1983-06-01 | $7700.00 | Window Closed / Lapsed |