US3240565A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of carbon black
Assignee: Phillips Petroleum Co
•
Filing: 1961-11-03
•
Granted: 1966-03-15
•
Expires: 1981-11-03
Abstract
No abstract record available.
Inventors
- 👤 Joseph C Krejci
- 👤 Paul H Johnson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 14:26
CPC Classifications
C; C10; C10G; C10G9/00; C09; C09C; C09C1/00; C09C1/44; C09C1/48; C09C1/50; C01; C01P; C01P2006/00; C01P2006/80
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
124 words
A PROCESS FOR PRODUCING A CARBON BLACK FROM A HEAVY NAPHTHENIC PETROLEUM CRUDE OIL HAVING AN API GRAVITY OF LESS THAN 20 DEGREES, A SUS VISCOSITY AT 210* F. WITHIN THE RANGE OF ABOUT 40 TO ABOUT 600, AND CONTAINING AT LEAST 1.5 PARTS OF POTASSIUM PER MILLION PARTS, BY WEIGHT, OF SAID OIL, WHICH PROCESS COMPRISES: CHARGING SAID CRUDE OIL TO A MILD THERMAL CRACKING OPERATION; RECOVERING A PITCH RESIDUE BY DISTILLING THE EFFLUENT FROM SAID CRACKING OPERATION; CHARGING SAID PITCH TO A COKING OPERATION; RECOVERING AN AROMATIC DISTILLATE NOMINALLY BOILING ABOVE ABOUT 400*F. FROM SAID COKING OPERATION; PARTIALLY BURNING SAID AROMATIC DISTILLATE IN A CARBON BLACK FURNACE UNDER CARBON BLACK PRODUCING CONDITIONS; AND RECOVERING CARBON BLACK FROM THE EFFLUENT FROM SAID FURNACE.
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) | 1969-03-14 | 1969-09-13 | 1970-03-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-03-14 | 1973-09-13 | 1974-03-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-03-14 | 1977-09-13 | 1978-03-15 | $7700.00 | Window Closed / Lapsed |