US2818394A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of platinum-containing catalysts
Assignee: Universal Oil Products Co
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Filing: 1954-05-24
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Granted: 1957-12-31
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Expires: 1974-05-24
Abstract
No abstract record available.
Inventors
- 👤 Haensel Vladimir
- 👤 Maurice J Murray
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 22:52
CPC Classifications
B; B01; B01J; B01J27/00; B01J27/06; B01J27/128; B01J27/13
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
59 words
IN THE COMPOSITING OF PLATINUM WITH A REFRACTORY INORGANIC OXIDE SUPPORT, THE METHOD WHICH COMPRISES IMPREGNATING THE SUPPORT WITH PLATINUM-CONTAINING SOLUTION IN A SERIES OF STAGES AND, AFTER EACH OF A PLURALITY OF SAID STAGES, HEATING THE IMPREGNATED SUPPORT, FIRST IN AN OXIDIZING ATMOSPHERE AND THEN IN A REDUCING ATMOSPHERE AT FROM ABOUT 500* F. TO ABOUT 1100* F.
Claim 2
Dependent Claim
59 words
IN THE COMPOSITING OF PLATINUM WITH A REFRACTORY INORGANIC OXIDE SUPPORT, THE METHOD WHICH COMPRISES IMPREGNATING THE SUPPORT WITH PLATINUM-CONTAINING SOLUTION IN A SERIES OF STAGES AND, AFTER EACH OF A PLURALITY OF SAID STAGES, HEATING THE IMPREGNATED SUPPORT, FIRST IN AN OXIDIZING ATMOSPHERE AND THEN IN A REDUCING ATMOSPHERE AT FROM ABOUT 500* F. TO ABOUT 1100* F.
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) | 1960-12-30 | 1961-07-01 | 1961-12-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-12-30 | 1965-07-01 | 1965-12-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-12-30 | 1969-07-01 | 1969-12-31 | $7700.00 | Window Closed / Lapsed |