Patent US2793173A successfully refreshed from Google Patents.
US2793173A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Prevention of coke deposits in fluid cokers
Assignee: ExxonMobil Technology and Engineering Co
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Filing: 1955-03-15
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Granted: 1957-05-21
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Expires: 1975-03-15
Abstract
No abstract record available.
Inventors
- 👤 Fritz Robert Joseph
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 03:37
CPC Classifications
C; C10; C10B; C10B55/00; C10B55/02; C10B55/04; C10B55/08; C10B55/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
125 words
IN A HYDROCARBON CONVERSION PROCESS WHEREIN AN OIL IS CONVERTED IN A FLUID COKING ZONE CONTAINING A BED OF FLUIDIZED PARTICULATE SOLIDS MAINTAINED AT A COKING TEMPERATURE, WHEREIN A PORTION OF SAID PARTICULATE SOLIDS IS CIRCULATED TO AN EXTERNAL HEATING ZONE AND BACK BY MEANS OF A CONVEYING GAS TO MAINTAIN SAID COKING TEMPERATURE, AND WHEREIN VAPOROUS CONVERSION PRODUCTS ARE WITHDRAWN OVERHEAD, A METHOD OF PREVENTING COKE DEPOSITS IN SAID FLUID COKING ZONE ABOVE THE LEVEL OF THE FLUID BED THEREIN WHICH COMPRISES INTRODUCING FRESHLY REHEATED SOLIDS INTO SAID COKING ZONE AT THE LEVEL OF SAID FLUID BED WHEREBY SAID CONVEYING GAS MIXES WITH SAID CONVERSION PRODUCTS WITHOUT BEING APPRECIABLE MIXED INTO SAID BED AND SERVES TO LOWER THE DEW POINT OF SAID CONVERSION PRODUCTS.
Claim 2
Dependent Claim
125 words
IN A HYDROCARBON CONVERSION PROCESS WHEREIN AN OIL IS CONVERTED IN A FLUID COKING ZONE CONTAINING A BED OF FLUIDIZED PARTICULATE SOLIDS MAINTAINED AT A COKING TEMPERATURE, WHEREIN A PORTION OF SAID PARTICULATE SOLIDS IS CIRCULATED TO AN EXTERNAL HEATING ZONE AND BACK BY MEANS OF A CONVEYING GAS TO MAINTAIN SAID COKING TEMPERATURE, AND WHEREIN VAPOROUS CONVERSION PRODUCTS ARE WITHDRAWN OVERHEAD, A METHOD OF PREVENTING COKE DEPOSITS IN SAID FLUID COKING ZONE ABOVE THE LEVEL OF THE FLUID BED THEREIN WHICH COMPRISES INTRODUCING FRESHLY REHEATED SOLIDS INTO SAID COKING ZONE AT THE LEVEL OF SAID FLUID BED WHEREBY SAID CONVEYING GAS MIXES WITH SAID CONVERSION PRODUCTS WITHOUT BEING APPRECIABLE MIXED INTO SAID BED AND SERVES TO LOWER THE DEW POINT OF SAID CONVERSION PRODUCTS.
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) | 1960-05-20 | 1960-11-19 | 1961-05-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-05-20 | 1964-11-19 | 1965-05-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-05-20 | 1968-11-19 | 1969-05-21 | $7700.00 | Window Closed / Lapsed |