USRE27926E
Expired / Lapsed
US
⏱️ 0.0 years remaining
Compositions and processes for treating exhaust
Assignee: —
•
Filing: 1970-12-21
•
Granted: 1974-02-19
•
Expires: 1990-12-21
Abstract
Abstract A CATALYTIC COMPOSITION AND A PROCESS FOR THE CATALYTIC OXIDATION OF EXHAUST GASES FROM AN AUTOMOBILE COMBUSTION ENGINE WHERE THE EXHAUST IS PASSED OVER A CATALYTIC COMPOSITE WHICH COMPRISES AN ACTIVE COPPER (OXIDE) COMPONENT WHICH IS OBTAINED ON AN ALUMINA BASE AND WHICH HAS A CRYSTALLINE CONTENT OF LESS THAN 2% BASED ON THE WEIGHT OF THE COMPOSITE. FURTHERMORE, THE CATALYTIC COMPOSITE HAS A MACROPORE VOLUME DETERMINED BY THE MEMRCURY PENETRATION METHOD OF ABOUT 0.05 TO 0.30 CUBIC CENTIMETER PER GRAM.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 19:33
CPC Classifications
B; B01; B01J; B01J35/00; B01J35/60; B01J35/63; B01J35/633; B01D; B01D53/00; B01D53/34; B01D53/92; B01D53/94; B01D53/944; B01J23/00; B01J23/70; B01J23/72; B01J35/70; B01J2235/00; B01J2235/15
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) | 1977-02-18 | 1977-08-20 | 1978-02-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-02-18 | 1981-08-20 | 1982-02-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-02-18 | 1985-08-20 | 1986-02-19 | $7700.00 | Window Closed / Lapsed |