US2774743A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for producing spheroidal alumina
Assignee: Universal Oil Products Co
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Filing: 1951-11-21
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Granted: 1956-12-18
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Expires: 1971-11-21
Abstract
No abstract record available.
Inventors
- 👤 Hoekstra James
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 20:43
CPC Classifications
B; B01; B01J; B01J23/00; B01J23/38; B01J23/40; B01J23/42; B01J21/00; B01J21/02; B01J21/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
70 words
A PROCESS FOR PRODUCING A PLATINUM-ON-ALUMINA CATALYST IN WHICH THE ALUMINA HAS AN APPARENT BULK DENSITY BELOW ABOUT 0.5 GM. PER CC., WHICH COMPRISES AGING ALUMINA GEL FIRST IN OIL AT A TEMPERATURE OF AT LEAST 125* F. FOR AT LEAST 10 HOURS AND THEN IN AMMONIUM HYDROXIDE SOLUTION AT A TEMPERATURE OF AT LEAST 125* F. FOR AT LEAST 10 HOURS, AND SUBSEQUENTLY COMPOSITING PLATINUM WITH THE ALUMINA GEL.
Claim 2
Dependent Claim
70 words
A PROCESS FOR PRODUCING A PLATINUM-ON-ALUMINA CATALYST IN WHICH THE ALUMINA HAS AN APPARENT BULK DENSITY BELOW ABOUT 0.5 GM. PER CC., WHICH COMPRISES AGING ALUMINA GEL FIRST IN OIL AT A TEMPERATURE OF AT LEAST 125* F. FOR AT LEAST 10 HOURS AND THEN IN AMMONIUM HYDROXIDE SOLUTION AT A TEMPERATURE OF AT LEAST 125* F. FOR AT LEAST 10 HOURS, AND SUBSEQUENTLY COMPOSITING PLATINUM WITH THE ALUMINA GEL.
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) | 1959-12-18 | 1960-06-18 | 1960-12-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-12-18 | 1964-06-18 | 1964-12-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-12-18 | 1968-06-18 | 1968-12-18 | $7700.00 | Window Closed / Lapsed |