Patent US2725349A successfully refreshed from Google Patents.
US2725349A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluid coking with alumina seeds
Assignee: ExxonMobil Technology and Engineering Co
•
Filing: 1954-06-02
•
Granted: 1955-11-29
•
Expires: 1974-06-02
Abstract
No abstract record available.
Inventors
- 👤 Robert P Cahn
- 👤 Jr Henry Ernst
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 04:28
CPC Classifications
C; C10; C10B; C10B55/00; C10B55/02; C10B55/04; C10B55/08; C10B55/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
114 words
IN A PROCESS FOR COKING A HEAVY HYDROCARBON OIL BY CONTACTING THE OIL COKING CHARGE STOCK AT A COKING TEMPERATURE WITH A BODY OF COKE PARTICLES MAINTAINED IN THE FORM OF A DENSE TURBULENT FLUIDIZED BED IN A REACTION ZONE, REMOVING PRODUCT VAPORS FROM THE REACTION ZONE, CIRCULATING THE COKE THROUGH AN EXTRANEOUS HEATING ZONE WHEREIN A PORTION OF THE COKE PARTICLES ARE BURNED, AND BACK TO THE REACTION ZONE TO SUPLY HEAT THERETO, AND WHEREIN SEED PARTICLES ARE ADDED CONTINUOUSLY TO THE REACTION ZONE IN ORDER TO COUNTERACT EXCESSIVE COKE PARTICLE GROWTH, THE IMPROVEMENT WHICH COMPRISES UTILIZING ALUMINA PARTICLES AS SEED TO THE REACTION ZONE AND WITHDRAWING COKE PARTICLES PRODUCT CONTAINING OCCLUDED ALUMINA.
Claim 2
Dependent Claim
114 words
IN A PROCESS FOR COKING A HEAVY HYDROCARBON OIL BY CONTACTING THE OIL COKING CHARGE STOCK AT A COKING TEMPERATURE WITH A BODY OF COKE PARTICLES MAINTAINED IN THE FORM OF A DENSE TURBULENT FLUIDIZED BED IN A REACTION ZONE, REMOVING PRODUCT VAPORS FROM THE REACTION ZONE, CIRCULATING THE COKE THROUGH AN EXTRANEOUS HEATING ZONE WHEREIN A PORTION OF THE COKE PARTICLES ARE BURNED, AND BACK TO THE REACTION ZONE TO SUPLY HEAT THERETO, AND WHEREIN SEED PARTICLES ARE ADDED CONTINUOUSLY TO THE REACTION ZONE IN ORDER TO COUNTERACT EXCESSIVE COKE PARTICLE GROWTH, THE IMPROVEMENT WHICH COMPRISES UTILIZING ALUMINA PARTICLES AS SEED TO THE REACTION ZONE AND WITHDRAWING COKE PARTICLES PRODUCT CONTAINING OCCLUDED ALUMINA.
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) | 1958-11-28 | 1959-05-30 | 1959-11-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-11-28 | 1963-05-30 | 1963-11-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-11-28 | 1967-05-30 | 1967-11-29 | $7700.00 | Window Closed / Lapsed |