US2608535A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Carbon-containing fischer-tropsch catalyst and its preparation
Assignee: Standard Oil Development Co
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Filing: 1948-03-26
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Granted: 1952-08-26
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Expires: 1968-03-26
Abstract
No abstract record available.
Inventors
- 👤 Bruce G Gillespie
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 23:15
CPC Classifications
B; B01; B01J; B01J37/00; B01J37/0009; B01J37/0018; B01J23/00; B01J23/16; B01J23/18; B01J23/70; B01J23/76; B01J23/78
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
51 words
AN IMPROVED IRON CATALYST OF THE CONVERSION OF CO WITH H2 CONSISTING ESSENTIALLY OF SINTERED IRON OBTAINED BY REDUCTION OF IRON OXIDE INTIMATELY MIXED WITH ABOUT 1-10% BY WEIGHT OF FINELY DIVIDED CARBON PARTICLES AND A SMALL PROMOTIONAL AMOUNT OF LESS THAN 10% BY WEIGHT OF AN ALKALI METAL COMPOUND PROMOTER.
Claim 2
Dependent Claim
51 words
AN IMPROVED IRON CATALYST OF THE CONVERSION OF CO WITH H2 CONSISTING ESSENTIALLY OF SINTERED IRON OBTAINED BY REDUCTION OF IRON OXIDE INTIMATELY MIXED WITH ABOUT 1-10% BY WEIGHT OF FINELY DIVIDED CARBON PARTICLES AND A SMALL PROMOTIONAL AMOUNT OF LESS THAN 10% BY WEIGHT OF AN ALKALI METAL COMPOUND PROMOTER.
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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) | 1955-08-26 | 1956-02-25 | 1956-08-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-08-26 | 1960-02-25 | 1960-08-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-08-26 | 1964-02-25 | 1964-08-26 | $7700.00 | Window Closed / Lapsed |