Patent EP0705576A1 successfully refreshed from Google Patents.
US3785998A
Expired / Lapsed
US
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Method of catalyst manufacture by impregnating honeycomb-type support
Assignee: Universal Oil Products Co
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Filing: 1971-06-30
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Granted: 1974-01-15
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Expires: 1991-06-30
Abstract
Abstract A RELATIVELY LOW SURFACE AREA HONEYCOMB-TYPE CERAMIC SUPPORT IS IMPREGNATED WITH A PLATINUM GROUP METAL COMPONENT DISSOLVED IN AN ALUMINA SOL, THE SOL FURTHER CONTAINING A SOLUBLE PLASTICIZER. THE SUPPORT IS THEREAFTER CALCINED TO FORM A PLATINUM GROUP METAL COMPONENT DISPERSED ON A UNIFORMLY THIN, HIGH SURFACE AREA ALUMINA FILM DEPOSITED ON SAID SUPPORT.
Inventors
- 👤 J Hoekstra
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:18
CPC Classifications
B; B01; B01J; B01J23/00; B01J23/38; B01J23/40; B01D; B01D53/00; B01D53/34; B01D53/92; B01D53/94; B01D53/944; B01J37/00; B01J37/0009; B01J37/0018; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24149
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-01-14 | 1977-07-16 | 1978-01-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-01-14 | 1981-07-16 | 1982-01-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-01-14 | 1985-07-16 | 1986-01-15 | $7700.00 | Window Closed / Lapsed |