US4257225A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Exhaust gas treatment to reduce particulated solids
Assignee: Texaco Inc
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Filing: 1978-10-10
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Granted: 1981-03-24
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Expires: 1998-10-10
Abstract
Abstract Method for reducing particulated carbon from the exhaust gas stream of an internal combustion engine which includes a combustion supporting ingredient. The particles are initially retained on a gas pervious bed. The latter is periodically treated by passing therethrough a gaseous mixture comprising a major portion of the particle-carrying gas, into which a minor portion of said gas, which has been treated to substantially deplete it of said particles and said combustion supporting ingredients, has been mixed.
Inventors
- 👤 John M. Crone, Jr.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 00:29
CPC Classifications
F; F01; F01N; F01N3/00; F01N3/02; F01N3/021; F01N3/031; F01N3/023; F01N3/029; F01N2330/00; F01N2330/10; F01N2410/00; F01N2410/02; F01N2410/10
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
130 words
Method for removing combustible particles from the hot exhaust gas stream having a combustion supporting ingredient therein, which includes the steps of; passing said hot exhaust gas stream carrying combustible particle through a particle-retaining bed leaving the latter substantially free of said particles and said combustion supporting ingredient, recycling a portion of the exhaust gas stream leaving said bed to mix with the hot particle-carrying exhaust gas at a point upstream of said bed, forming a diluted gaseous mixture comprising a major portion of the hot exhaust gas stream, and a minor portion of said exhaust gas which is substantially free of said particles and said combustion supporting ingredient, and introducing said diluted gaseous mixture into said particle-retaining bed whereby to limit the rate at which retained particles are combusted.
Claim 2
Dependent Claim
130 words
Method for removing combustible particles from the hot exhaust gas stream having a combustion supporting ingredient therein, which includes the steps of; passing said hot exhaust gas stream carrying combustible particle through a particle-retaining bed leaving the latter substantially free of said particles and said combustion supporting ingredient, recycling a portion of the exhaust gas stream leaving said bed to mix with the hot particle-carrying exhaust gas at a point upstream of said bed, forming a diluted gaseous mixture comprising a major portion of the hot exhaust gas stream, and a minor portion of said exhaust gas which is substantially free of said particles and said combustion supporting ingredient, and introducing said diluted gaseous mixture into said particle-retaining bed whereby to limit the rate at which retained particles are combusted.
Claim 3
Dependent Claim
30 words
In the method as defined in claim 1, including the step of; concurrently recycling a portion of the gas leaving said bed, and diverting an amount of hot particle-carrying gas.
Claim 4
Dependent Claim
28 words
In the method as defined in claim 1, including the step of; pressurizing said recycled stream of particle-free gas prior to intermixing thereof with said particle carrying gas.
Claim 5
Dependent Claim
30 words
In the method as defined in claim 1, including the step of; establishing a reduced pressure downstream of said particle-retaining bed to induce said amount of substantially particle-free gas therefrom.
References Cited (Backward Citations)
US2985255A
Cited
US3440817A
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US3499269A
Cited
US3937015A
Cited
DE2519609A1
Cited
US4167852A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-03-23 | 1984-09-22 | 1985-03-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-03-23 | 1988-09-22 | 1989-03-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-03-23 | 1992-09-22 | 1993-03-24 | $7700.00 | Window Closed / Lapsed |