US3733181A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Catalytic exhaust gas treatment apparatus
Assignee: Chemical Construction Corp
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Filing: 1971-05-14
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Granted: 1973-05-15
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Expires: 1991-05-14
Abstract
Abstract AN APPARATUS FOR CATALYTICALLY TREATING THE EXHAUST GAS FROM AN ENGINE, SO AS TO ELIMINATE NOXIOUS COMPONENTS IN THE EXHAUST GAS. THE APPARATUS FEATURES CONCENTRIC CYLINDRICAL INNER AND OUTER CATALYST BEDS, MEANS TO PASS THE ENGINE EXHAUST GAS RADIALLY OUTWARDS THROUGH THE BEDS, AND MEANS TO INJECT AIR INTO THE EXHAUST GAS BETWEEN THE INNER AND THE OUTER BED, SO THAT CATALYTIC REDUCTION OF NITROGEN OXIDES TO NITROGEN TAKES PLACE IN THE INNER BED AND CATALYTIC OXIDATION OF HYDROCARBONS AND CARBON MONOXIDE TO WATER VAPOR AND CARBON DIOXIDE TAKES PLACE IN THE OUTER BED.
Inventors
- 👤 J Tourtellotte
- 👤 Fisher J Villiers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 02:58
CPC Classifications
B; B01; B01D; B01D53/00; B01D53/34; B01D53/92; B01D53/94; B01D53/9459; B01D53/9463; B01D53/9472; B01D53/9404; B01D53/9409; B01D53/9413; B01D53/944; B01J; B01J8/00; B01J8/02; B01J8/04; B01J8/0403; B01J8/0407; B01J8/0411; B01J8/0496; B01J8/06; F; F01; F01N; F01N13/00; F01N13/009; F01N13/0097; F01N3/00; F01N3/08; F01N3/10; F01N3/18; F01N3/20; F01N3/2006; F01N3/2013; F01N3/24; F01N3/28; F01N3/2839; F01N3/2846; F01N3/30; F01N3/32; B01D2255/00; B01D2255/20; B01D2255/207; B01D2255/2073; B01D2255/20746; B01D2255/20753; B01D2255/20761; B01J2208/00; B01J2208/00008; B01J2208/00017; B01J2208/00106; B01J2208/00168; B01J2208/00212; B01J2208/00221; B01J2208/00389; B01J2208/00415; B01J2208/00477; B01J2208/00495; B01J2208/0053; F01N2240/00; F01N2240/02; F01N2240/16; F01N2510/00; F01N2510/06; Y; Y02; Y02A; Y02A50/00; Y02A50/20; Y02T; Y02T10/00; Y02T10/10; Y02T10/12
Claims Analysis
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References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-05-14 | 1976-11-13 | 1977-05-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-05-14 | 1980-11-13 | 1981-05-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-05-14 | 1984-11-13 | 1985-05-15 | $7700.00 | Window Closed / Lapsed |