US3723070A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Catalytic oxidation apparatus
Assignee: Oxy Catalyst Inc
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Filing: 1970-11-27
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Granted: 1973-03-27
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Expires: 1990-11-27
Abstract
Abstract INTERNAL COMBUSTION ENGINE EXHAUST GASES ARE CATALYTICALLY OXIDIZED BY PROVIDING IN THE GAS STREAM A CATALYTIC HOT RESISTANCE ELEMENT OF SMALL MASS AND SURFACE AREA AND A DOWNSTREAM CATALYST BED OF LARGE MASS AND SURFACE AREA. THE HOT RESISTANCE ELEMENT QUICKLY REACHES CATALYTICALLY EFFECTIVE TEMPERATURE, AND ITS HEAT PLUS HEAT OF CATALYTIC OXIDATION COACT TO ACCELERATE THE HEATING OF THE LARGE CATALYST BED ACCELERATING ITS HEATING AND CAUSING IT QUICKLY TO REACH ITS EFFECTIVE CATALYTIC OPERATING TEMPERATURE.
Inventors
- 👤 J Houdry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 14:08
CPC Classifications
F; F01; F01N; F01N3/00; F01N3/08; F01N3/10; F01N3/24; F01N3/28; F01N3/2839; F01N3/285; F01N3/18; F01N3/20; F01N3/2006; F01N3/2013; F01N3/2803; F01N3/2807; F01N3/2835; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12
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) | 1976-03-26 | 1976-09-25 | 1977-03-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-03-26 | 1980-09-25 | 1981-03-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-03-26 | 1984-09-25 | 1985-03-27 | $7700.00 | Window Closed / Lapsed |