Patent DE520564C successfully refreshed from Google Patents.
Patent US2530345A successfully refreshed from Google Patents.
US2530345A
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Preparation of a spheroidal fischer-tropsch catalyst
Assignee: Standard Oil Development Co
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Filing: 1948-09-30
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Granted: 1950-11-14
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Expires: 1968-09-30
Abstract
No abstract record available.
Inventors
- 👤 Rhea N Watts
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 06:04
CPC Classifications
C; C07; C07C; C07C1/00; C07C1/02; C07C1/04; C07C1/0425; B; B01; B01J; B01J21/00; B01J23/00; B01J23/70; B01J23/76; B01J23/78; B01J35/00; B01J35/30; B01J35/396; B01J35/398; B01J35/50; B01J35/51; B01J35/53; C07C2523/00; C07C2523/70; C07C2523/74; C07C2523/745
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
115 words
A PROCESS FOR THE PREPARATION OF AN IRON CATALYST COMPRISING IRON MICROSPHERES CONTAINING IRON CORES AND OXIDIZED COATINGS, WHEREIN SAID OXIDIZED COATINGS MAY HAVE THICKNESSES UP TO ABOUT 20 MICRONS, WHICH COMPRISES MELTING SUBSTANTILLY PURE IRON, SPRAYING MOLTEN IRON PREDOMINANTLY IN THE FORM OF SUBSTANTIALLY SPHERICAL PARTICLES SUBSTANTIALLY EXCLUSIVELY ABOVE 20 MICRONS IN DIAMETER THROUGH AN ATMOSPHERE COMPRISING 5 TO 60% OXYGEN AND THROUGH A DISTANCE OF FROM ABOUT 1/2 TO ABOUT 3 FEET AND QUENCHING THE RESULTANT SPRAYED MATERIAL IN WATER, WHEREBY SOLID IRON SPHERES CONTAINING RELATIVELY PURE IRON CORES AND OXIDIZED COATINGS ARE OBTAINED, CONTROLLING SAID OXYGEN PERCENTAGE AND SAID DISTANCE WITHIN THE RANGES INDICATED IN SUCH A MANNER THAT THE THICKNESS OF
Claim 2
Dependent Claim
115 words
A PROCESS FOR THE PREPARATION OF AN IRON CATALYST COMPRISING IRON MICROSPHERES CONTAINING IRON CORES AND OXIDIZED COATINGS, WHEREIN SAID OXIDIZED COATINGS MAY HAVE THICKNESSES UP TO ABOUT 20 MICRONS, WHICH COMPRISES MELTING SUBSTANTILLY PURE IRON, SPRAYING MOLTEN IRON PREDOMINANTLY IN THE FORM OF SUBSTANTIALLY SPHERICAL PARTICLES SUBSTANTIALLY EXCLUSIVELY ABOVE 20 MICRONS IN DIAMETER THROUGH AN ATMOSPHERE COMPRISING 5 TO 60% OXYGEN AND THROUGH A DISTANCE OF FROM ABOUT 1/2 TO ABOUT 3 FEET AND QUENCHING THE RESULTANT SPRAYED MATERIAL IN WATER, WHEREBY SOLID IRON SPHERES CONTAINING RELATIVELY PURE IRON CORES AND OXIDIZED COATINGS ARE OBTAINED, CONTROLLING SAID OXYGEN PERCENTAGE AND SAID DISTANCE WITHIN THE RANGES INDICATED IN SUCH A MANNER THAT THE THICKNESS OF
References Cited (Backward Citations)
US446986A
Cited
US1695041A
Cited
US2406864A
Cited
US2365720A
Cited
US2360787A
Cited
US2417164A
Cited
US2476920A
Cited
US2480341A
Cited
US2469755A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-11-13 | 1954-05-15 | 1954-11-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-11-13 | 1958-05-15 | 1958-11-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-11-13 | 1962-05-15 | 1962-11-14 | $7700.00 | Window Closed / Lapsed |