Patent US2564696A successfully refreshed from Google Patents.
US2564696A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydrocarbon synthesis
Assignee: Hydrocarbon Research Inc
•
Filing: 1946-12-03
•
Granted: 1951-08-21
•
Expires: 1966-12-03
Abstract
No abstract record available.
Inventors
- 👤 Percival C Keith
- 👤 Earl W Riblett
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 16:09
CPC Classifications
B; B01; B01J; B01J23/00; B01J23/70; B01J23/76; B01J23/78; B01J23/90; B01J23/94; C; C07; C07C; C07C1/00; C07C1/02; C07C1/04; C07C1/0455; C07C1/047; Y; Y02; Y02P; Y02P20/00; Y02P20/50; Y02P20/584
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
130 words
IN A VAPOR PHASE PROCESS FOR THE REACTION OF CARBON MONOXIDE AND HYDROGEN TO PRODUCE COMPOUNDS OF HIGHER MOLECULAR WEIGHT THAN CARBON MONOXIDE INCLUDING NORMALLY LIQUID HYDROCARBONS WHEREIN THE REACTION IS CARRIED OUT IN THE PRESENCE OF A CATALYST OF THE IRON GROUP HAVING A RELATIVELY MINOR ALKALI METAL CONTENT AS A PROMOTER AND UNDER CONDITIONS OF DENSE PHASE FLUIDIZATION OF THE CATALYST AND WHEREIN THE SELECTIVITY OF THE CATALYST FOR THE PRODUCTION OF NORMALLY LIQUID HYDROCARBONS TENDS TO DECLINE DURING THE LIFE OF THE CATALYST, THE IMPROVEMENT WHICH COMPRISES PERIODICALLY SUPPLEMENTING THE ALKALI METAL CONTENT OF THE CATALYST DURING THE LIFE OF THE CATALYST BY INJECTING AN ALKALI METAL COMPOUND EFFECTIVE FOR IMPROVEMENT OF SAID SELECTIVELY DIRECTLY ONTO SAID FLUIDIZED CATALYST AND THEREBY RESTORING SAID SELECTIVELY OF THE CATALYST.
Claim 2
Dependent Claim
130 words
IN A VAPOR PHASE PROCESS FOR THE REACTION OF CARBON MONOXIDE AND HYDROGEN TO PRODUCE COMPOUNDS OF HIGHER MOLECULAR WEIGHT THAN CARBON MONOXIDE INCLUDING NORMALLY LIQUID HYDROCARBONS WHEREIN THE REACTION IS CARRIED OUT IN THE PRESENCE OF A CATALYST OF THE IRON GROUP HAVING A RELATIVELY MINOR ALKALI METAL CONTENT AS A PROMOTER AND UNDER CONDITIONS OF DENSE PHASE FLUIDIZATION OF THE CATALYST AND WHEREIN THE SELECTIVITY OF THE CATALYST FOR THE PRODUCTION OF NORMALLY LIQUID HYDROCARBONS TENDS TO DECLINE DURING THE LIFE OF THE CATALYST, THE IMPROVEMENT WHICH COMPRISES PERIODICALLY SUPPLEMENTING THE ALKALI METAL CONTENT OF THE CATALYST DURING THE LIFE OF THE CATALYST BY INJECTING AN ALKALI METAL COMPOUND EFFECTIVE FOR IMPROVEMENT OF SAID SELECTIVELY DIRECTLY ONTO SAID FLUIDIZED CATALYST AND THEREBY RESTORING SAID SELECTIVELY OF THE CATALYST.
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) | 1954-08-20 | 1955-02-19 | 1955-08-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-08-20 | 1959-02-19 | 1959-08-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-08-20 | 1963-02-19 | 1963-08-21 | $7700.00 | Window Closed / Lapsed |