US3698873A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotary afterburner for internal combustion engines
Assignee: Daihatsu Motor Co Ltd
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Filing: 1971-01-25
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Granted: 1972-10-17
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Expires: 1991-01-25
Abstract
Abstract A ROTARY AFTERBURNER FOR INTERNAL COMBUSTION ENGINES INCLUDES A ROTARY HEAT EXCHANGER IN THE FORM OF A HONEYCOMB MATRIX LOCATED WITHIN A COMBUSTION CHAMBER INTO WHICH EXHAUST GASES FROM THE ENGINE EXHAUST MANIFOLD ARE INTRODUCED AFTER PASSING THROUGH ONE SECTION OF THE ROTATING HEAT EXCHANGER. THE EXHAUST GASES ARE BURNED IN THE COMBUSTION CHAMBER AND THENCE ARE PASSED THROUGH ANOTHER SECTION OF THE ROTATING HEAT EXCHANGER AND FINALLY EXHAUSTED TO ATMOSPHERE THROUGH AN EXHAUST PIPE.
Inventors
- 👤 Takashi Kohayakawa
- 👤 Shinichi Yamamoto
- 👤 Michio Morimoto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 17:53
CPC Classifications
F; F01; F01N; F01N3/00; F01N3/08; F01N3/10; F01N3/24; F01N3/26; F01N2240/00; F01N2240/02; F01N2290/00; F01N2290/02; F01N3/38; Y; Y10; Y10S; Y10S60/00; Y10S60/902
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) | 1975-10-17 | 1976-04-17 | 1976-10-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-10-17 | 1980-04-17 | 1980-10-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-10-17 | 1984-04-17 | 1984-10-17 | $7700.00 | Window Closed / Lapsed |