US3988113A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for treating engine exhaust gases
Assignee: Individual
•
Filing: 1973-08-17
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Granted: 1976-10-26
•
Expires: 1993-08-17
Abstract
Abstract An apparatus for treating engine exhaust gases for the effective removal of carbon monoxide, hydrocarbons and/or the oxides of nitrogen from the exhaust system of mobile internal combustion engines. A readily accessible exhaust treating tube in the engine exhaust pipe system contains a removable and disposable open end cartridge which, in turn, contains a fibrous filter which is impregnated with a chemical solution for treating the exhaust gases passing therethrough. The disposable cartridge may be easily replaced at regular intervals by simply removing the spent cartridge and inserting a new one.
Inventors
- 👤 Arnold L. Roberts
- 👤 Stuart Adelkoff
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 03:05
CPC Classifications
F; F01; F01N; F01N13/00; F01N13/18; F01N13/1888; F01N13/1894; B; B01; B01D; B01D53/00; B01D53/34; B01D53/92; B01D53/922; B01D53/925; F01N3/00; F01N3/08; F01N2250/00; F01N2250/14; F01N2310/00; F01N2310/02; F01N2450/00; F01N2450/24; F01N2450/30; Y; Y10; Y10S; Y10S55/00; Y10S55/30
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
130 words
An apparatus for purifying engine exhaust gases comprising, an engine exhaust pipe system, an engine exhaust gas purifying tube having a chamber serially connected in said engine exhaust pipe system and having access means for the insertion and removal of a filter cartridge radially mating the walls of said chamber, a disposable filter cartridge in said chamber and radially mating the walls thereof, said cartridge including filter means consisting of asbestos material in the form of a woven tubular fibrous asbestos filter member with a center core of loosely spaced fibrous filter strands freely extending substantially radially inwardly from said tubular member for the passage of exhaust gases therethrough, said fibrous filter member and strands in said cartridge being impregnated with a desired liquid chemical for purifying said exhaust gases.
Claim 2
Independent Claim
130 words
An apparatus for purifying engine exhaust gases comprising, an engine exhaust pipe system, an engine exhaust gas purifying tube having a chamber serially connected in said engine exhaust pipe system and having access means for the insertion and removal of a filter cartridge radially mating the walls of said chamber, a disposable filter cartridge in said chamber and radially mating the walls thereof, said cartridge including filter means consisting of asbestos material in the form of a woven tubular fibrous asbestos filter member with a center core of loosely spaced fibrous filter strands freely extending substantially radially inwardly from said tubular member for the passage of exhaust gases therethrough, said fibrous filter member and strands in said cartridge being impregnated with a desired liquid chemical for purifying said exhaust gases.
Claim 3
Dependent Claim
30 words
The apparatus for purifying engine exhaust gases of claim 1 wherein said asbestos material is a member selected from the group consisting of Chrysotile, Amphibole, Crocidolite, Amosite and mixtures thereof.
Claim 4
Dependent Claim
22 words
The apparatus for purifying engine exhaust gases of claim 1 wherein said disposable cartridge also includes a cylinder containing said filter means.
Claim 5
Dependent Claim
27 words
The apparatus for purifying engine exhaust gases of claim 1 wherein said woven tubular member covers approximately 50% of the cross sectional area of said filter means.
Claim 6
Dependent Claim
48 words
The apparatus for purifying engine exhaust gases of claim 1 further comprising air inlet means for admitting air into the interior of said exhaust gas purifying tube, said air inlet means located upstream of said filter cartridge in juxtaposition with the trailing end of said exhaust pipe system.
Claim 7
Dependent Claim
54 words
The apparatus for purifying engine exhaust gases of claim 1 further comprising a closed canister containing said liquid chemical and secured relative to said exhaust gas purifying tube, and a wick passing through said canister and communicating said liquid chemical therein with said fibrous filter member to continually replenish said member with said chemical.
Claim 8
Dependent Claim
28 words
The apparatus for purifying engine exhaust gases of claim 1 wherein said exhaust gas purifying tube is secured to the open trailing end of said exhaust pipe system.
Claim 9
Dependent Claim
27 words
The apparatus for purifying engine exhaust gases of claim 7 further comprising means on said cartridge for retaining said cartridge in said engine exhaust gas purifying chamber.
Claim 10
Dependent Claim
33 words
The apparatus for purifying engine exhaust gases of claim 8 wherein said exhaust gas purifying tube is inclined downwardly from the juncture thereof with said open trailing end of said exhaust pipe system.
Claim 11
Dependent Claim
31 words
The apparatus for purifying engine exhaust gases of claim 8 further comprising clamp means for securing said exhaust gas purifying tube to said open trailing end of said exhaust pipe system.
Claim 12
Dependent Claim
28 words
The apparatus for purifying engine exhaust gases of claim 9 wherein said clamp means is adjustable to accommodate different diameter open trailing ends of said exhaust pipe system.
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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) | 1979-10-26 | 1980-04-26 | 1980-10-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-10-26 | 1984-04-26 | 1984-10-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-10-26 | 1988-04-26 | 1988-10-26 | $7700.00 | Window Closed / Lapsed |