Patent US3782115A successfully refreshed from Google Patents.
US3782115A
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Method and apparatus for reducing nitrogen oxide air pollution
Assignee: Individual
•
Filing: 1970-09-30
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Granted: 1974-01-01
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Expires: 1990-09-30
Abstract
Abstract A method and apparatus for reducing the nitrogen dioxide content of internal combustion engine exhaust gases by cooling the gases, condensing the water vapor therein and dissolving and taking off the nitrogen dioxide in the water condensate.
Inventors
- 👤 C Johnson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 12:04
CPC Classifications
F; F01; F01N; F01N3/00; F01N3/02; F01N3/037; F01N3/04; F01N3/043; F01N3/05; F01N2240/00; F01N2240/02; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12; Y10; Y10S; Y10S55/00; Y10S55/30
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1388480A
Cited
US1653603A
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US2115228A
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US2966036A
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US3153579A
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US3389972A
Cited
US3456439A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-12-31 | 1977-07-02 | 1978-01-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-12-31 | 1981-07-02 | 1982-01-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-12-31 | 1985-07-02 | 1986-01-01 | $7700.00 | Window Closed / Lapsed |