US2500331A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of applying promoters to catalyst particles
Assignee: Standard Oil Co
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Filing: 1947-12-05
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Granted: 1950-03-14
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Expires: 1967-12-05
Abstract
No abstract record available.
Inventors
- 👤 Voorhees Vanderveer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 02:10
CPC Classifications
B; B01; B01J; B01J23/00; B01J23/70; B01J23/76
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
140 words
THE PROCESS OF MAKING A FINELY DIVIDED IRON CATALYST CONTAINING AN AVERAGE CONCENTRATION OF PROMOTER SELECTED FROM THE CLASS CONSISTING OF ALKALI AND ALKALINE EARTH METAL COMPOUNDS OF BETWEEN ABOUT .1 AND ABOUT 2.5%, WHICH COMPRISES THE STEPS OF CLASSIFYING THE FINELY DIVIDED IRON CATALYST INTO RELATIVELY FINE AND RELATIVELY COARSE PARTICLES, APPLYING A RELATIVELY DILUTE SOLUTION OF PROMOTOR TO THE SURFACE OF THE RELATIVELY FINE CATAYST PARTICLES, APPLYING A RELATIVELY STRONG SOLUTION OF PROMOTOR TO THE SURFACE OF THE RELATIVELY COARSE CATALYST PARTICLES, THE CONCENTRATION OF SOLUTION OF PROMOTOR BEING CORRELATED WITH THE WEIGHT OF THE IRON PARTICLES IN A DIRECT PROPORTION RELATIONSHIP, SEPARATELY DRYING THE TWO SIZES OF PROMOTED CATALYST, AND RECOMBINING TO PRODUCE A FLUIDIZABLE MIXTURE OF FINELY DIVIDED IRON CATALYST HAVING A UNIFORM PROPORTION OF PROMOTOR IN EACH SIZE RANGE BASED UPON THE WEIGHT OF CATALYST.
Claim 2
Dependent Claim
140 words
THE PROCESS OF MAKING A FINELY DIVIDED IRON CATALYST CONTAINING AN AVERAGE CONCENTRATION OF PROMOTER SELECTED FROM THE CLASS CONSISTING OF ALKALI AND ALKALINE EARTH METAL COMPOUNDS OF BETWEEN ABOUT .1 AND ABOUT 2.5%, WHICH COMPRISES THE STEPS OF CLASSIFYING THE FINELY DIVIDED IRON CATALYST INTO RELATIVELY FINE AND RELATIVELY COARSE PARTICLES, APPLYING A RELATIVELY DILUTE SOLUTION OF PROMOTOR TO THE SURFACE OF THE RELATIVELY FINE CATAYST PARTICLES, APPLYING A RELATIVELY STRONG SOLUTION OF PROMOTOR TO THE SURFACE OF THE RELATIVELY COARSE CATALYST PARTICLES, THE CONCENTRATION OF SOLUTION OF PROMOTOR BEING CORRELATED WITH THE WEIGHT OF THE IRON PARTICLES IN A DIRECT PROPORTION RELATIONSHIP, SEPARATELY DRYING THE TWO SIZES OF PROMOTED CATALYST, AND RECOMBINING TO PRODUCE A FLUIDIZABLE MIXTURE OF FINELY DIVIDED IRON CATALYST HAVING A UNIFORM PROPORTION OF PROMOTOR IN EACH SIZE RANGE BASED UPON THE WEIGHT OF 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) | 1953-03-13 | 1953-09-12 | 1954-03-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-03-13 | 1957-09-12 | 1958-03-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-03-13 | 1961-09-12 | 1962-03-14 | $7700.00 | Window Closed / Lapsed |