US3829294A
Expired / Lapsed
US
⏱️ 0.0 years remaining
By-pass valve control
Assignee: Motors Liquidation Co
•
Filing: 1972-08-21
•
Granted: 1974-08-13
•
Expires: 1992-08-21
Abstract
Abstract A DEVICE TO PROTECT A CATALYTIC CONVERTER FROM OVERHEATING WHICH INCLUDES A VALVE NORMALLY DIRECTING EXHAUST GAS FLOW INTO THE CATALYTIC CONVERTER, A CHAMBER CONTAINING COMPRESSED FLUID AND HAVING ONE WALL COMPRISING A FLEXIBLE DIAPHRAGM LINKED TO THE VALVE AND HELD AGAINST A COMPRESSED SPRING BY THE COMPRESSED FLUID, A FLUID CONDUCTION PASSAGE BETWEEN THE CHAMBER AND THE INTERIOR OF THE CATALYTIC CONVERTER, AND A FUSIBLE PLUG IN THE PASSAGE WITHIN THE CATALYTIC CONVERTER WHICH MELTS AT A PREDETERMINED TEMPERATURE TO ALLOW THE COMPRESSED FLUID TO ESCAPE AND THE SPRING TO MOVE THE VALVE TO DIRECT THE EXHAUST GASES AROUND THE CATALYTIC CONVERTER.
Inventors
- 👤 G Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 08:20
CPC Classifications
F; F01; F01N; F01N3/00; F01N3/08; F01N3/10; F01N3/18; F01N3/20; F01N3/2053; F01N2330/00; F01N2330/08; F01N2390/00; F01N2390/06; F01N2410/00; F01N2410/02
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) | 1977-08-12 | 1978-02-11 | 1978-08-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-08-12 | 1982-02-11 | 1982-08-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-08-12 | 1986-02-11 | 1986-08-13 | $7700.00 | Window Closed / Lapsed |