US3201207A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Muffler
Assignee: Walker Manufacturing Co
•
Filing: 1961-09-15
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Granted: 1965-08-17
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Expires: 1981-09-15
Abstract
No abstract record available.
Inventors
- 👤 Ervin C Lentz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 21:17
CPC Classifications
F; F01; F01N; F01N3/00; F01N3/08; F01N3/10; F01N3/24; F01N3/30; F01N3/18; F01N3/20; F01N3/2053; F01N3/22; F01N3/34; F01N2230/00; F01N2230/04; F01N2270/00; F01N2270/04; F01N2330/00; F01N2330/08; F01N2390/00; F01N2390/06; F01N2410/00; F01N2410/02; F01N2470/00; F01N2470/02; F01N2470/30; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12; Y10; Y10S; Y10S55/00; Y10S55/30
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
152 words
A CONVERSION SYSTEM FOR THE COMBUSTION OF UNBURNED CONSTITUENTS IN THE EXHAUST GASES OF AN INTERNAL COMBUSTION ENGINE COMPRISING A CATALYTIC CONVERTER HAVING AN INLET FOR ATTACHMENT TO AN EXHAUST PIPE AND A CATALYST BED HAVING AN INLET SIDE AND AN OUTLET SIDE, VALVE MEANS IN THE PATH OF GAS FLOW TO SAID BED FOR SELECTIVELY DIRECTING THE GAS TO THE INLET SIDE OR TO THE OUTLET SIDE OF SAID BED, VALVE OPERATING MECHANISM FOR OPERATING SAID VALVE MEANS, SAID MECHANISM INCLUDING BED TEMPERATURE RESPONSIVE MEANS WHEREBY SAID VALVE MEANS IS OPERATED IN RESPONSE TO CHANGES IN BED TEMPERATURE, SAID VALVE MEANS INCLUDING A PRESSURE RESPONSIVE SURFACE EXPOSED TO THE PRESSURE OF INCOMING EXHAUST GAS AND ARRANGED TO URGE SAID VALVE MEANS TOWARD A POSITION WHEREIN IT DIRECTS GAS TO THE OUTLET SIDE OF SAID BED WHEREBY SAID VALVE MEANS WILL FALL-SAFE IN THE EVENT OF MALFUNCTION OF SAID VALVE OPERATING MECHANISM.
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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) | 1968-08-16 | 1969-02-15 | 1969-08-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-08-16 | 1973-02-15 | 1973-08-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-08-16 | 1977-02-15 | 1977-08-17 | $7700.00 | Window Closed / Lapsed |