Patent US2731395A successfully refreshed from Google Patents.
US2731395A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Conversion of hydrocarbons in two stages with inert and catalyst particles
Assignee: ExxonMobil Technology and Engineering Co
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Filing: 1951-06-29
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Granted: 1956-01-17
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Expires: 1971-06-29
Abstract
No abstract record available.
Inventors
- 👤 Charles E Jahnig
- 👤 Frank T Barr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 18:13
CPC Classifications
C; C10; C10G; C10G51/00; C10G51/02; C10G51/04; C10B; C10B55/00; C10B55/02; C10B55/04; C10B55/08; C10B55/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
129 words
IN A METHOD OF PRODUCING LOWER BOILING HYDROCARBON OILS FROM A HEAVY RESIDUAL PETROLEUM OIL COMPRISING THE STEPS OF COKING SAID RESIDUAL OIL IN A COKING ZONE IN THE PRESENCE OF A DENSE FLUIDIZED HIGHLY TURBULENT BED OF FINELY DIVIDED SOLID PARTICLES IN THE BOTTOM PORTION OF A CONTACTING ZONE, SAID BED BEING MAINTAINED AT A TEMPERATURE IN THE RANGE OF 900* TO 1300* F., FOR A TIME SUFFICIENT TO EFFEECT CRACKING AND COKING OF THE RESIDUAL OIL; PASSING THE VAPOROUS PRODUCTS UPWARDLY THROUGH A BED OF TREATING CATALYST TO REFINE SAID VAPORS TO REMOVE GUMFORMING MATERIALS, SAID BED BEING ARRANGED IN THE TOP PORTION OF THE CONTACTING ZONE AND THEN REMOVING TREATED VAPORS FROM THE TOP PORTION, THE IMPROVEMENT WHICH COMPRISES PASSING THE VAPOROUS PRODUCTS FROM THE COKING
Claim 2
Dependent Claim
129 words
IN A METHOD OF PRODUCING LOWER BOILING HYDROCARBON OILS FROM A HEAVY RESIDUAL PETROLEUM OIL COMPRISING THE STEPS OF COKING SAID RESIDUAL OIL IN A COKING ZONE IN THE PRESENCE OF A DENSE FLUIDIZED HIGHLY TURBULENT BED OF FINELY DIVIDED SOLID PARTICLES IN THE BOTTOM PORTION OF A CONTACTING ZONE, SAID BED BEING MAINTAINED AT A TEMPERATURE IN THE RANGE OF 900* TO 1300* F., FOR A TIME SUFFICIENT TO EFFEECT CRACKING AND COKING OF THE RESIDUAL OIL; PASSING THE VAPOROUS PRODUCTS UPWARDLY THROUGH A BED OF TREATING CATALYST TO REFINE SAID VAPORS TO REMOVE GUMFORMING MATERIALS, SAID BED BEING ARRANGED IN THE TOP PORTION OF THE CONTACTING ZONE AND THEN REMOVING TREATED VAPORS FROM THE TOP PORTION, THE IMPROVEMENT WHICH COMPRISES PASSING THE VAPOROUS PRODUCTS FROM THE COKING
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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) | 1959-01-16 | 1959-07-18 | 1960-01-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-01-16 | 1963-07-18 | 1964-01-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-01-16 | 1967-07-18 | 1968-01-17 | $7700.00 | Window Closed / Lapsed |