Patent US3781406A successfully refreshed from Google Patents.
US3781406A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of treating auto exhaust with shrinkage resistant copper aluminaterare earth catalysts
Assignee: Monsanto Co
•
Filing: 1971-07-07
•
Granted: 1973-12-25
•
Expires: 1991-07-07
Abstract
Abstract A SHRINGKAGE RESISTANT AUTO EXHAUST CATALYST COMPRISED OF AN ALUMINA SUPPORT AND SPECIFIED AMOUNTS OF COPPER, CHROMIUM, AND SPECIFIED RARE EARTH COMPOUNDS, IS EMPLOYED UNDER OXIDIZING CONDITIONS TO OXIDIZE CARBON MONOXIDE AND HYDROCARBONS IN EXHAUST.
Inventors
- 👤 J Roth
- 👤 J Gambell
- 👤 C Penquite
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 20:07
CPC Classifications
B; B01; B01J; B01J23/00; B01J23/70; B01J23/76; B01J23/84; B01J23/85; B01J23/86; B01J23/868; B01D; B01D53/00; B01D53/34; B01D53/92; B01D53/94; B01D53/944
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1976-12-24 | 1977-06-25 | 1977-12-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-12-24 | 1981-06-25 | 1981-12-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-12-24 | 1985-06-25 | 1985-12-25 | $7700.00 | Window Closed / Lapsed |