US3179602A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of a chromia-alumina hydrocarbon conversion catalyst
Assignee: Monsanto Co
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Filing: 1961-09-06
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Granted: 1965-04-20
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Expires: 1981-09-06
Abstract
No abstract record available.
Inventors
- 👤 Alcuin F Gremillion
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 02:06
CPC Classifications
B; B01; B01J; B01J23/00; B01J23/16; B01J23/24; B01J23/26; C; C07; C07C; C07C5/00; C07C5/32; C07C5/373; C07C5/393; C07C5/41; C07C5/412
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
82 words
A METHOD OF PREPARING A CHROMINA-ALUMINA CATALYST CONSISTING OF IMPREGNATING AN ALUMINA SUPPORT WITH A SOLUTION OF CRO3, DRYING THE IMPREGNATED ALUMINA AND CALCINING THE DRIED CATALYST BY HEATING FROM ROOM TEMPERATURE TO 450 TO 600*C. MAINTAINING SAID CATALYST AT A REDUCED PRESSURE OF 10**1 TO 10**5 MM. HG, AND THEN COOLING SAID CATALYST BACK TO ROOM TEMPERATURE WHILE STILL MAINTAINING SAID CATALYST AT SAID REDUCED PRESSURE OF 10**1 TO 10**5 MM. HG, AND THEREAFTER REDUCING THE CATALYST IN A HYDROGEN ATMOSPHERE.
Claim 2
Independent Claim
82 words
A METHOD OF PREPARING A CHROMINA-ALUMINA CATALYST CONSISTING OF IMPREGNATING AN ALUMINA SUPPORT WITH A SOLUTION OF CRO3, DRYING THE IMPREGNATED ALUMINA AND CALCINING THE DRIED CATALYST BY HEATING FROM ROOM TEMPERATURE TO 450 TO 600*C. MAINTAINING SAID CATALYST AT A REDUCED PRESSURE OF 10**1 TO 10**5 MM. HG, AND THEN COOLING SAID CATALYST BACK TO ROOM TEMPERATURE WHILE STILL MAINTAINING SAID CATALYST AT SAID REDUCED PRESSURE OF 10**1 TO 10**5 MM. HG, AND THEREAFTER REDUCING THE CATALYST IN A HYDROGEN ATMOSPHERE.
References Cited (Backward Citations)
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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) | 1968-04-19 | 1968-10-19 | 1969-04-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-04-19 | 1972-10-19 | 1973-04-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-04-19 | 1976-10-19 | 1977-04-20 | $7700.00 | Window Closed / Lapsed |