US2778715A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Carbon black collecting system employing orlon bag filters
Assignee: Phillips Petroleum Co
•
Filing: 1953-11-13
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Granted: 1957-01-22
•
Expires: 1973-11-13
Abstract
No abstract record available.
Inventors
- 👤 Oliver K Austin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 12:10
CPC Classifications
C; C09; C09C; C09C1/00; C09C1/44; C09C1/48; C09C1/487
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
45 words
IN A PROCESS FOR RECOVERING CARBON BLACK FROM A HOT GASEOUS EFFLUENT FROM A CARBON BLACK FURNACE WHEREIN SAID EFFLUENT IS PASSED THROUGH A PLURALITY OF COOLING AND CARBON BLACK SEPARATING ZONES, AND THE CARBON BLACK SO SEPARATED IS RECOVERED, THE IMPROVEMENT WHICH COMPRISES IN-
Claim 2
Dependent Claim
45 words
IN A PROCESS FOR RECOVERING CARBON BLACK FROM A HOT GASEOUS EFFLUENT FROM A CARBON BLACK FURNACE WHEREIN SAID EFFLUENT IS PASSED THROUGH A PLURALITY OF COOLING AND CARBON BLACK SEPARATING ZONES, AND THE CARBON BLACK SO SEPARATED IS RECOVERED, THE IMPROVEMENT WHICH COMPRISES IN-
References Cited (Backward Citations)
US1730485A
Cited
US2292355A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-01-22 | 1960-07-23 | 1961-01-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-01-22 | 1964-07-23 | 1965-01-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-01-22 | 1968-07-23 | 1969-01-22 | $7700.00 | Window Closed / Lapsed |