US2498838A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Synthesis of hydrocarbons
Assignee: Standard Oil Development Co
•
Filing: 1945-09-12
•
Granted: 1950-02-28
•
Expires: 1965-09-12
Abstract
No abstract record available.
Inventors
- 👤 Lindsay I Griffin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 13:56
CPC Classifications
C; C07; C07C; C07C1/00; C07C1/02; C07C1/04; C07C1/0485; C07C2523/00; C07C2523/70; C07C2523/74; C07C2523/745
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
122 words
PROCESS FOR PRODUCING HYDROCARBONS FROM CARBON OXIDES AND HYDROGEN, WHICH COMPRISES PASSING A MIXTURE OF CARBON OXIDES AND HYDROGEN AT A SYNTHESIS TEMPERATURE THROUGH A REACTION ZONE IN CONTACT WITH A DENSE TURBULENT MASS OF FINELY DIVIDED FLUIDIZED SYNTHESIS CATALYST FORMING A WELL DEFINED UPPER LEVEL WHICH SEPARATES SAID MASS FROM AN UPPER LOW DENSITY CATALYST ZONE, WITHDRAWING HEAT FROM SAID MASS BY INDIRECT HEAT EXCHANGE WITHIN SAID REACTION ZONE, WITHDRAWING PRODUCT GASES FROM THE CATALYST, RECYCLING A MAJOR PORTION OF THE PRODUCT GASES SUBSTANTIALLY AT THE TEMPERATURE OF THEIR WITHDRAWAL DIRECTLY TO THE CATALYST, PASSING A MINOR PORTION OF THE PRODUCT GASES THROUGH A PRODUCT RECOVERY SYSTEM TO REMOVE REACTION PRODUCTS THEREFROM AND RECYCLING TAIL GAS FROM THE PRODUCT RECOVERY SYSTEM
Claim 2
Dependent Claim
122 words
PROCESS FOR PRODUCING HYDROCARBONS FROM CARBON OXIDES AND HYDROGEN, WHICH COMPRISES PASSING A MIXTURE OF CARBON OXIDES AND HYDROGEN AT A SYNTHESIS TEMPERATURE THROUGH A REACTION ZONE IN CONTACT WITH A DENSE TURBULENT MASS OF FINELY DIVIDED FLUIDIZED SYNTHESIS CATALYST FORMING A WELL DEFINED UPPER LEVEL WHICH SEPARATES SAID MASS FROM AN UPPER LOW DENSITY CATALYST ZONE, WITHDRAWING HEAT FROM SAID MASS BY INDIRECT HEAT EXCHANGE WITHIN SAID REACTION ZONE, WITHDRAWING PRODUCT GASES FROM THE CATALYST, RECYCLING A MAJOR PORTION OF THE PRODUCT GASES SUBSTANTIALLY AT THE TEMPERATURE OF THEIR WITHDRAWAL DIRECTLY TO THE CATALYST, PASSING A MINOR PORTION OF THE PRODUCT GASES THROUGH A PRODUCT RECOVERY SYSTEM TO REMOVE REACTION PRODUCTS THEREFROM AND RECYCLING TAIL GAS FROM THE PRODUCT RECOVERY SYSTEM
References Cited (Backward Citations)
US2224048A
Cited
US2243869A
Cited
US2279052A
Cited
US2345957A
Cited
US2360787A
Cited
US2347682A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-02-27 | 1953-08-29 | 1954-02-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-02-27 | 1957-08-29 | 1958-02-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-02-27 | 1961-08-29 | 1962-02-28 | $7700.00 | Window Closed / Lapsed |