Patent US3176461A successfully refreshed from Google Patents.
US3176461A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Internal combustion engine exhaust gas converters
Assignee: Individual
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Filing: 1963-10-01
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Granted: 1965-04-06
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Expires: 1983-10-01
Abstract
No abstract record available.
Inventors
- 👤 Willard R Calvert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 14:12
CPC Classifications
F; F01; F01N; F01N3/00; F01N3/08; F01N3/10; F01N3/18; F01N3/20; F01N3/2006; F01N3/2046; F01N3/2053; F01N3/24; F01N3/28; F01N3/2803; F01N3/2839; F01N3/2846; F01N3/30; F01N3/34; F01N13/00; F01N13/14; F01N2240/00; F01N2240/02; F01N2330/00; F01N2330/08; F01N2450/00; F01N2450/04; F01N2470/00; F01N2470/30; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
92 words
AN EXHAUST GAS CONVERTER FOR INTERNAL COMBUSTION ENGINES COMPRISING AN EXHAUST GAS MANIFOLD CONNECTION HAVING A FIRST GAS CONDUIT FOR LOW MASS GAS FLOW AND A SECOND BARE GASA CONDUIT FOR HIGH MASS GAS FLOW, A VALVE IN SAID SECOND GAS CONDUIT, A CONTROL MEMBER FOR SAID VALVE, A SONIC MUFFLER HAVING AN INTERIOR SPACE WITH A SEPSEPARATELY ENCLOSED CATALYING UNIT THEREIN, SAID FIRST GAS CONDUIT EXTENDING TO AND FROM SAID ENCLOSED CATALYTIC UNIT FOR DELIVERY OF GAS THERETHROUGH, SAID SECOND GAS CONDUIT BEING CONNECTED TO SAID SONIC MUFFLER INTERIOR SPACE EX-
Claim 2
Dependent Claim
92 words
AN EXHAUST GAS CONVERTER FOR INTERNAL COMBUSTION ENGINES COMPRISING AN EXHAUST GAS MANIFOLD CONNECTION HAVING A FIRST GAS CONDUIT FOR LOW MASS GAS FLOW AND A SECOND BARE GASA CONDUIT FOR HIGH MASS GAS FLOW, A VALVE IN SAID SECOND GAS CONDUIT, A CONTROL MEMBER FOR SAID VALVE, A SONIC MUFFLER HAVING AN INTERIOR SPACE WITH A SEPSEPARATELY ENCLOSED CATALYING UNIT THEREIN, SAID FIRST GAS CONDUIT EXTENDING TO AND FROM SAID ENCLOSED CATALYTIC UNIT FOR DELIVERY OF GAS THERETHROUGH, SAID SECOND GAS CONDUIT BEING CONNECTED TO SAID SONIC MUFFLER INTERIOR SPACE EX-
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-04-05 | 1968-10-05 | 1969-04-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-04-05 | 1972-10-05 | 1973-04-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-04-05 | 1976-10-05 | 1977-04-06 | $7700.00 | Window Closed / Lapsed |