US3637353A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for purifying and silencing the exhaust gases of a hydrocarbon-fueled engine
Assignee: Oxy Catalyst Inc
•
Filing: 1970-08-24
•
Granted: 1972-01-25
•
Expires: 1990-08-24
Abstract
Abstract An apparatus for purifying and silencing the exhaust gases generated by a hydrocarbon fuel and more especially a gasoline or diesel-fueled engine. The apparatus has an outer shell having inlet and outlet ports and an access means for servicing the apparatus. Inside the shell there are three coaxially aligned chambers through which the exhaust gases flow in series from the inlet port to the outlet port. The central chamber is packed with a heavy metal catalyst, for example, a platinum-plated catalyst for purifying the exhaust gases. The apparatus is especially useful on automobiles, buses and trucks which are operated in congested center city areas.
Inventors
- 👤 Harold R Smithson
- 👤 Kenneth P Strohl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 13:02
CPC Classifications
F; F01; F01N; F01N3/00; F01N3/08; F01N3/10; F01N3/24; F01N3/28; F01N3/2839; F01N3/2846; F01N2330/00; F01N2330/08; F01N2470/00; F01N2470/18; F01N2470/22; F02; F02B; F02B3/00; F02B3/06; Y; Y02; Y02A; Y02A50/00; Y02A50/20
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
27 words
The apparatus according to claim 1 wherein about 35 percent of said partition means between the central chamber and intermediate chamber is perforated to provide said apertures.
Claim 2
Dependent Claim
15 words
The apparatus according to claim 1 wherein said catalyst is a heavy metal oxidation catalyst.
Claim 3
Dependent Claim
11 words
The apparatus according to claim 1 wherein said catalyst is platinum.
Claim 4
Dependent Claim
19 words
The apparatus according to claim 1 wherein said catalyst is metallic platinum supported on a heat resistant support material.
Claim 5
Dependent Claim
18 words
The apparatus according to claim 1 wherein said catalyst has a diameter of about three-sixteenths of an inch.
Claim 6
Dependent Claim
39 words
The apparatus according to claim 1 wherein the intermediate chamber is in communication with a reservoir means for holding excess amounts of said catalyst whereby the amount of catalyst in said intermediate chamber is maintained at a constant level.
Claim 7
Dependent Claim
28 words
The apparatus according to claim 1 wherein about 33-36 percent of said partition means between the central chamber and said intermediate chamber is perforated to provide said apertures.
Claim 8
Dependent Claim
33 words
The apparatus according to claim 8 wherein said apertures are of a size suffiCient to retain said granular catalyst having a diameter from 1/8 to three-sixteenths of an inch in said intermediate chamber.
References Cited (Backward Citations)
CA542802A
Cited
AT142388B
Cited
AT147401B
Cited
DE675355C
Cited
US2290121A
Cited
DE911490C
Cited
US2772147A
Cited
US3024593A
Cited
US3041149A
Cited
US3166895A
Cited
US3083084A
Cited
US3088271A
Cited
US3186807A
Cited
US3166382A
Cited
US3220179A
Cited
FR1443886A
Cited
US3563030A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-01-24 | 1975-07-26 | 1976-01-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-01-24 | 1979-07-26 | 1980-01-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-01-24 | 1983-07-26 | 1984-01-25 | $7700.00 | Window Closed / Lapsed |