Patent US2852346A successfully refreshed from Google Patents.
US2852346A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process and apparatus for the production of carbon black
Assignee: Phillips Petroleum Co
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Filing: 1954-08-23
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Granted: 1958-09-16
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Expires: 1974-08-23
Abstract
No abstract record available.
Inventors
- 👤 Oliver K Austin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 23:56
CPC Classifications
C; C09; C09C; C09C1/00; C09C1/44; C09C1/48; C09C1/50
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
82 words
IN A CARBON BLACK PRODUCTION REACTOR COMPRISING A SUBSTANTIALLY CYLINDRICAL REACTION CHAMBER, INLET MEANS ADAPTED TO DIRECTE FLUID LONGITUDINALLY THROUGH SAID CHAMBER, OUTLET MEANS IN COMMUNICATION WITH SAID CHAMBER, AND INLET MEANS TANGENTIALLY POSITIONED WITH RESPECT TO AN INNER WALL OF SAID REACTOR AND ADAPTED TO DIRECT FLUID THROUGH SAID CHAMBER IN A SUBSTANTIALLY HELICAL PATH, THE IMPROVEMENT WHICH COMPRISES A REFRACTORY HELIX POSITIONED WITHIN SAID REACTION CHAMBER CONTIGUOUSLY WITH A WALL THEREOF AND CONFORMING TO THE DIRECTION OF SAID HELICAL PATH.
Claim 2
Dependent Claim
82 words
IN A CARBON BLACK PRODUCTION REACTOR COMPRISING A SUBSTANTIALLY CYLINDRICAL REACTION CHAMBER, INLET MEANS ADAPTED TO DIRECTE FLUID LONGITUDINALLY THROUGH SAID CHAMBER, OUTLET MEANS IN COMMUNICATION WITH SAID CHAMBER, AND INLET MEANS TANGENTIALLY POSITIONED WITH RESPECT TO AN INNER WALL OF SAID REACTOR AND ADAPTED TO DIRECT FLUID THROUGH SAID CHAMBER IN A SUBSTANTIALLY HELICAL PATH, THE IMPROVEMENT WHICH COMPRISES A REFRACTORY HELIX POSITIONED WITHIN SAID REACTION CHAMBER CONTIGUOUSLY WITH A WALL THEREOF AND CONFORMING TO THE DIRECTION OF SAID HELICAL PATH.
Claim 3
Dependent Claim
51 words
IN A PROCESS IN WHICH A CARBONACEOUS MATERIAL IS CONVERTED TO CARBON BLACK IN A REACTION ZONE BY VIRTURE OF HEAT DIRECTLY ABSORBED FROM A HOT GAS, THE IMPROVEMENT WHICH COMPRISES PASSING THE HEATED CARBONACEOUS MATERIAL ADJACENT A RADIANT, RIBBED SURFACE IN SAID ZONE EXTENDING THROUGHOUT THE MAJOR LONGITUDINAL EXTENT THEREOF.
Claim 4
Dependent Claim
51 words
IN A PROCESS IN WHICH A CARBONACEOUS MATERIAL IS CONVERTED TO CARBON BLACK IN A REACTION ZONE BY VIRTURE OF HEAT DIRECTLY ABSORBED FROM A HOT GAS, THE IMPROVEMENT WHICH COMPRISES PASSING THE HEATED CARBONACEOUS MATERIAL ADJACENT A RADIANT, RIBBED SURFACE IN SAID ZONE EXTENDING THROUGHOUT THE MAJOR LONGITUDINAL EXTENT THEREOF.
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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) | 1961-09-15 | 1962-03-17 | 1962-09-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-09-15 | 1966-03-17 | 1966-09-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-09-15 | 1970-03-17 | 1970-09-16 | $7700.00 | Window Closed / Lapsed |