US3702236A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Catalytic converter
Assignee: Universal Oil Products Co
•
Filing: 1971-02-19
•
Granted: 1972-11-07
•
Expires: 1991-02-19
Abstract
Abstract A CATALYTIC CONVERTER FOR TREATING AN ENGINE EXHAUST STREAM WHICH EMBODIES A PAIR OF PASSAGEWAYS DISPOSED ALONG THE FREE SIDE OF THE CATALYST COMPARTMENT WITHIN AN OUTER HOUSING. THE PASSAGEWAYS COMMUNICATE WITH MANIFOLD COMPARTMENTS FORMED BETWEEN THE HOUSING AND THE PREFORATED PARTITIONS WHICH FORM THE CATALYST COMPARTMENT, OVER SUBSTANTIALLY THE TOTAL LENGTH OF EACH PASSAGEWAY.
Inventors
- 👤 Leroy E Fessler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 20:36
CPC Classifications
B; B01; B01D; B01D53/00; B01D53/34; B01D53/74; B01D53/86; F; F01; F01N; F01N3/00; F01N3/08; F01N3/10; F01N3/24; F01N3/28; F01N3/2839; F01N3/2846; F01N3/2892; F01N2260/00; F01N2260/10; F01N2260/16; F01N2330/00; F01N2330/08; F01N2510/00; F01N2510/06; Y; Y10; Y10S; Y10S55/00; Y10S55/30
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) | 1975-11-07 | 1976-05-08 | 1976-11-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-11-07 | 1980-05-08 | 1980-11-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-11-07 | 1984-05-08 | 1984-11-07 | $7700.00 | Window Closed / Lapsed |