Patent US2166575A successfully refreshed from Google Patents.
Patent US2541671A successfully refreshed from Google Patents.
US2541671A
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Preparation of a fluid catalyst for hydrocarbon synthesis
Assignee: Standard Oil Development Co
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Filing: 1946-09-05
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Granted: 1951-02-13
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Expires: 1966-09-05
Abstract
No abstract record available.
Inventors
- 👤 Marnell A Segura
- 👤 Don R Mcadams
- 👤 William E Spicer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 23:26
CPC Classifications
C; C07; C07C; C07C1/00; C07C1/02; C07C1/04; C07C1/0425; C07C1/0445; B; B01; B01J; B01J23/00; B01J23/70; B01J23/74; B01J23/745; C07C2523/00; C07C2523/70; C07C2523/74; C07C2523/745; C07C2527/00; C07C2527/20; C07C2527/232
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
51 words
THE METHOD OF PREPARING IRON CATALYST WHICH COMPRISES SUBJECTING A REDUCED PRECIPITATED IRON OXIDE MAS TO A SINTERING TREATMENT IN AN OXIDIZING ATMOSPHERE AT A TEMPERATURE OF ABOUT 1200*-1600* F., GRINDING THE SINTERED MATERIAL TO A FLUIDIZABLE PARTICLE SIZE AND REDUCING THE SINTERED MATERIAL AT A TEMPERATURE OF ABOUT 800*-1500* F.
Claim 2
Independent Claim
51 words
THE METHOD OF PREPARING IRON CATALYST WHICH COMPRISES SUBJECTING A REDUCED PRECIPITATED IRON OXIDE MAS TO A SINTERING TREATMENT IN AN OXIDIZING ATMOSPHERE AT A TEMPERATURE OF ABOUT 1200*-1600* F., GRINDING THE SINTERED MATERIAL TO A FLUIDIZABLE PARTICLE SIZE AND REDUCING THE SINTERED MATERIAL AT A TEMPERATURE OF ABOUT 800*-1500* F.
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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) | 1954-02-12 | 1954-08-14 | 1955-02-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-02-12 | 1958-08-14 | 1959-02-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-02-12 | 1962-08-14 | 1963-02-13 | $7700.00 | Window Closed / Lapsed |