US3710548A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process and device for purifying air
Assignee: Individual
•
Filing: 1970-10-19
•
Granted: 1973-01-16
•
Expires: 1990-10-19
Abstract
Abstract A process and device in which air or another gas mixture is contacted with a liquid whereby particulate impurities are washed from the gas and whereby sulfur dioxide and other gaseous pollutants, together with oxygen, are absorbed from the gas into the liquid whereupon said sulfur dioxide and other gaseous pollutants are oxidized to other more soluble chemical forms with the assistance of a catalyst present within the system.
Inventors
- 👤 R Coughlin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 09:38
CPC Classifications
B; B01; B01D; B01D53/00; B01D53/14; B01D53/18; B01D53/1456; B01D53/1481; B01D53/34
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
19 words
The process of claim 1 wherein the gas is air and the temperature of operation is about room temperature.
Claim 2
Dependent Claim
14 words
The process of claim 2 wherein particulate matter is also filtered from the gas.
Claim 3
Dependent Claim
26 words
The process of claim 2 wherein the catalyst is selected from the group which consists of compounds of Cu, Co, Mn, Fe, Ni, Cr, and V.
Claim 4
Dependent Claim
36 words
The process of claim 4 wherein particulate matter is also filtered from the gas and wherein the concentration of said catalyst exceeds about 30 parts by weight per one million parts by weight of said water.
Claim 5
Dependent Claim
12 words
The process of claim 3 wherein the catalyst is a carbonaceous material.
Claim 6
Independent Claim
148 words
An apparatus for removing an oxide of sulfur or nitrogen from air, wherein oxygen and said oxide are absorbed into an aqueous liquid, wherein said oxide is oxidized to more soluble form with the assistance of a catalyst, comprising means forming a reservoir, a body of liquid in said reservoir, catalyst means in contact with said liquid, first and second drum means, said first drum means being positioned at least partly below the surface of said body of water and said second drum means positioned above said body, a flexible, porous movable filter belt positioned on said drum means, blower means positioned to force said air through said filter belt and means to move said belt, after contacting said gas, into and out of said reservoir whereby particulate impurities are removed by filtering action and gaseous impurities and oxygen are absorbed by the liquid transported by said belt.
Claim 7
Dependent Claim
15 words
The apparatus of claim 7 wherein said catalyst means is contained within said filter belt.
Claim 8
Dependent Claim
16 words
The apparatus of claim 7 wherein said catalyst means is contained within said body of liquid.
Claim 9
Dependent Claim
13 words
The apparatus of claim 7 wherein said catalyst means is a carbonaceous material.
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) | 1976-01-16 | 1976-07-17 | 1977-01-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-01-16 | 1980-07-17 | 1981-01-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-01-16 | 1984-07-17 | 1985-01-16 | $7700.00 | Window Closed / Lapsed |