US2533694A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Conditioning iron catalyst
Assignee: Stanolind Oil and Gas Co
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Filing: 1947-02-01
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Granted: 1950-12-12
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Expires: 1967-02-01
Abstract
No abstract record available.
Inventors
- 👤 Robert V Safford
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 18:14
CPC Classifications
B; B01; B01J; B01J23/00; B01J23/70; B01J23/76; B01J23/78; Y; Y10; Y10S; Y10S252/00; Y10S252/18
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
125 words
IN THE METHOD OF TREATING A FINELY DIVIDED IRON CATALYST HAVING AN ALKALI METAL COMPOUND ADSORBED THEREON AND TENDING TO AGGLOMERATE AT TEMPERATURES ABOVE ABOUT 700 DEGREE F., THE STEPS OF PASSING A REDUCING GAS UPWARDLY THROUGH A BODY OF THE IRON CATALYST INITALLY IN A DENSE TURBULENT SUSPENDED PHASE, INCREASING THE TEMPERATURE OF THE CATALYST PHASE ABOVE ABOUT 700 DEGREE F. UNTIL THERE IS A TENDENCY FOR THE CATALYST TO SETTLE FROM THE SUSPENDED PHASE, DECREASING THE TEMPERATURE TO A POINT WHERE THE CATALYST IS FREELY SUSPENDED IN THE DENSE TURBULENT PHASE, AND ALTERNATELY INCREASING AND DECREASING THE TEMPERATURE AS TO MAINTAIN THE CATALYST AT THE HIGHEST TEMPERTURE LEVEL AT WHICH THE BODY OF CATALYST CAN BE MAINTAINED IN THE DENSE TURBULENT SUSPENDED PHASE.
Claim 2
Dependent Claim
125 words
IN THE METHOD OF TREATING A FINELY DIVIDED IRON CATALYST HAVING AN ALKALI METAL COMPOUND ADSORBED THEREON AND TENDING TO AGGLOMERATE AT TEMPERATURES ABOVE ABOUT 700 DEGREE F., THE STEPS OF PASSING A REDUCING GAS UPWARDLY THROUGH A BODY OF THE IRON CATALYST INITALLY IN A DENSE TURBULENT SUSPENDED PHASE, INCREASING THE TEMPERATURE OF THE CATALYST PHASE ABOVE ABOUT 700 DEGREE F. UNTIL THERE IS A TENDENCY FOR THE CATALYST TO SETTLE FROM THE SUSPENDED PHASE, DECREASING THE TEMPERATURE TO A POINT WHERE THE CATALYST IS FREELY SUSPENDED IN THE DENSE TURBULENT PHASE, AND ALTERNATELY INCREASING AND DECREASING THE TEMPERATURE AS TO MAINTAIN THE CATALYST AT THE HIGHEST TEMPERTURE LEVEL AT WHICH THE BODY OF CATALYST CAN BE MAINTAINED IN THE DENSE TURBULENT SUSPENDED PHASE.
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) | 1953-12-11 | 1954-06-12 | 1954-12-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-12-11 | 1958-06-12 | 1958-12-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-12-11 | 1962-06-12 | 1962-12-12 | $7700.00 | Window Closed / Lapsed |