US3095272A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Smoke control
Assignee: Phillips Petroleum Co
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Filing: 1961-08-14
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Granted: 1963-06-25
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Expires: 1981-08-14
Abstract
No abstract record available.
Inventors
- 👤 Sam C Naifeh
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 16:59
CPC Classifications
C; C09; C09C; C09C1/00; C09C1/44; C09C1/48; C09C1/50; B; B01; B01J; B01J19/00; B01J19/0006
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
123 words
A METHOD FOR PRODUCING CARBON BLACK COMPRISING TTHE STEPS OF CONVERTING A HYDROCARBON TO A SMOKE CONPRISING CARBON BLACK IN A PLURALITY OF REACTION ZONES, PASSING SAID SMOKE FROM EACH OF SAID REACTION ZONES THROUGH A SEPARATE CONDUCTING ZONE TO A SINGLE SMOKE COLLECTION ZONE, PREVENTING BACKFLOW OF SMOKE FROM SAID COLLECTION ZONE TO ONE OF SAID CONDUCTING ZONES DURING AN INTERVAL WHEN THE CORRESPONDING REACTION ZONE IS NOT IN OPERATION BY PRODUCING A BUFFER ZONE IN SAID ONE CONDUCTING ZONE ADJACENT SAID COLLECTION ZONE BY SUBSTANTIALLY RESTRICTING THE FLOW AREA OF SAID ONE CONDUCTING ZONE AT TWO LOCATIONS, REDUCING THE PRESSURE IN SAID BUFFER ZONE BELOW ATMOSPHERIC BY WITHDRAWING FLUID FROM SAID BUFFER ZONE AND PASSING SAID FLUID INTO SAID COLLELCTION ZONE.
References Cited (Backward Citations)
US2950179A
Cited
US2963152A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-06-24 | 1966-12-24 | 1967-06-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-06-24 | 1970-12-24 | 1971-06-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-06-24 | 1974-12-24 | 1975-06-25 | $7700.00 | Window Closed / Lapsed |