US3224981A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Supported copper oxide and palladium catalyst composition
Assignee: Ethyl Corp
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Filing: 1961-12-29
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Granted: 1965-12-21
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Expires: 1981-12-29
Abstract
No abstract record available.
Inventors
- 👤 Ruth E Stephens
- 👤 Jr Daniel A Hirschler
- 👤 Frances W Lamb
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 22:32
CPC Classifications
B; B01; B01J; B01J23/00; B01J23/70; B01J23/89; B01J23/8926; B01D; B01D53/00; B01D53/34; B01D53/92; B01D53/94; B01D53/944
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
76 words
A CATALYST COMPOSITION ESPECIALLY ADAPTED TO SUBSTANTIALLY OXIDE THE UNBURNED HYDROCARBONS AND CARBON MONOXIDE CONSTITUENTS OF THE EXHAUST GAS OF INTERNAL COMBUSTION ENGINES, SAID COMPOSITION CONSISTING ESSENTIALLY OF A MAJOR PORTION OF A HIGH SPECIFIC SURFACE AREA SUPPORT, SELECTED FROM THE GROUP CONSISTING OF ACTIVATED TRANSITIONAL ALUMINAS, ALUMINUM SILICATES, ALUMINUM GELS, MAGNESIUM GELS, THORIA, MAGNESIA AND ZIRCONIA FROM ABOUT 0.5 TO 25 PERCENT COPPER IN AN OXIDE FORM AND FROM 0.01 TO ABOUT 3 PERCENT PALLADIUM.
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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) | 1968-12-20 | 1969-06-21 | 1969-12-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-12-20 | 1973-06-21 | 1973-12-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-12-20 | 1977-06-21 | 1977-12-21 | $7700.00 | Window Closed / Lapsed |