Patent US3789022A successfully refreshed from Google Patents.
US3789022A
Expired / Lapsed
US
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Catalyst for oxidation of hydrocarbons and carbon monoxide
Assignee: OCCIDENTIAL ELECTROCHEMICALS Corp
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Filing: 1971-08-19
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Granted: 1974-01-29
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Expires: 1991-08-19
Abstract
Abstract AN IMPROVED CATALYST FOR OXIDATION OF HYDROCARBONS AND CARBON MONOXIDE IS PREPARED BY DEPOSITING AN AN ALUMINA SUPPORT LAYERS OF OXIDES OF COPPER, CERIUM AND CHROMIUM. ENHANCED CATALYST ACTIVITY IS OBTAINED WHEN CERIUM OXIDE IS APPLIED AS THE MIDDLE LAYER. CATALYTIC ACTIVITY IS FURTHER ENHANCED BY APPLYING THE COPPER OXIDE LAYER FIRST AND MAINTAINING THE MOLAR RATIO OF COPPER TO CHROMIUM GREATER THAN ONE.
Inventors
- 👤 B Schenker
- 👤 K Taylor
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 09:26
CPC Classifications
B; B01; B01D; B01D53/00; B01D53/34; B01D53/92; B01D53/94; B01D53/944; B01J; B01J23/00; B01J23/70; B01J23/76; B01J23/84; B01J23/85; B01J23/86; B01J23/868; Y; Y02; Y02A; Y02A50/00; Y02A50/20
Claims Analysis
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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) | 1977-01-28 | 1977-07-30 | 1978-01-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-01-28 | 1981-07-30 | 1982-01-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-01-28 | 1985-07-30 | 1986-01-29 | $7700.00 | Window Closed / Lapsed |