Patent US2973647A successfully refreshed from Google Patents.
Patent US3687637A successfully refreshed from Google Patents.
US3687637A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Combined silencer and exhaust gas cleaner
Assignee: HIBIYA BUSSAN CO Ltd
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Filing: 1970-09-14
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Granted: 1972-08-29
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Expires: 1990-09-14
Abstract
Abstract A COMBINED SILENCER AND EXHAUST GAS CLEANER COMPRISING A PLURALITY OF DIFFUSING AND EXPANDING CHAMBERS CONNECTED IN SERIES TO AN EXHAUST GAS INLET PIPE. EACH CHAMBER PREFERABLY COMPRISES SEPARABLE BOWL-SHAPED SHELLS. A CONICAL BAFFLE PLATE IS DISPOSED INTERNALLY OF EACH CHAMBER. INNER AND OUTER COAXIAL CYLINDRICAL WIRE NET TUBES ARE SUPPORTED BY THE BAFFLE PLATE AND CONTAIN A CATALYST THEREIN FOR ABSORBING THE HARMFUL COMPONENTS CONTAINED IN THE EXHAUST GAS.
Inventors
- 👤 Saburo Okamura
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 01:24
CPC Classifications
F; F01; F01N; F01N3/00; F01N3/08; F01N3/0807; F01N3/0828; F01N3/085; B; B01; B01D; B01D53/00; B01D53/34; B01D53/92; B01D53/94; B01D53/944; B01D53/9459; B01D53/9477; B01D53/9481; B01D53/949; F01N13/00; F01N13/009; F01N3/0814; F01N3/10; F01N3/24; F01N3/28; F01N3/2803; F01N3/2832; F01N3/2839; F01N3/2846; F01N3/2882; F01N3/2885; F01N3/2892; B01D2255/00; B01D2255/10; B01D2255/102; B01D2255/1021; B01D2255/1025; B01D2255/90; B01D2255/92; B01D2255/9202; F01N2230/00; F01N2230/04; F01N2250/00; F01N2250/12; F01N2330/00; F01N2330/08; F01N2470/00; F01N2470/02; F01N2490/00; F01N2490/02; F01N2490/04; F01N2570/00; F01N2570/02; Y; Y02; Y02A; Y02A50/00; Y02A50/20; Y10; Y10S; Y10S55/00; Y10S55/30
Claims Analysis
Total Claims: 0
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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) | 1975-08-29 | 1976-02-28 | 1976-08-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-29 | 1980-02-28 | 1980-08-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-29 | 1984-02-28 | 1984-08-29 | $7700.00 | Window Closed / Lapsed |