US3616339A
Expired / Lapsed
US
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Process for purifying air
Assignee: Wyeth Holdings LLC
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Filing: 1969-10-17
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Granted: 1971-10-26
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Expires: 1989-10-17
Abstract
Abstract Oxidizable gas impurities in air are removed at the anode of a powered electrochemical cell which comprises an air cathode, a matrix electrolyte and an anode having a surface of lead dioxide or other metal or metal oxide in direct contact with the impinging impure air and in electrical contact with the electrolyte.
Inventors
- 👤 William Frank Marzluff
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 19:53
CPC Classifications
B; B01; B01D; B01D53/00; B01D53/32; B01D53/326
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
17 words
A process defined by claim 1 wherein said metal or metal oxide electrode surface is lead dioxide.
Claim 2
Dependent Claim
16 words
A process defined by claim 1 wherein said metal or metal oxide surface is manganese dioxide.
Claim 3
Dependent Claim
23 words
A process defined by claim 1 wherein said electrode surface is lead dioxide on a conductive substrate and said electrolyte is sulfuric acid.
Claim 4
Dependent Claim
27 words
A process defined by claim 1 wherein said positive electrode comprises a lead plate with a surface coat of leAd dioxide and said electrolyte is sulfuric acid.
Claim 5
Dependent Claim
69 words
A process for purifying air which comprises bringing air which contains oxidizable gas contaminants into contact with a metal or metal oxide electrode surface at the positive electrode of an electrolytic cell and bringing oxidizing air in contact with the negative air electrode of said cell which has an electrolyte contacting said positive and negative electrodes, and supplying electric current to said device, whereby purification of air is attained.
Claim 6
Dependent Claim
14 words
A process according to claim 6 wherein said oxidizable gas contaminants comprise ketone contaminants.
Claim 7
Dependent Claim
14 words
A process according to claim 6 wherein said oxidizing gas contaminants comprise ester contaminants.
Claim 8
Dependent Claim
15 words
A process according to claim 6 wherein said oxidizing gas contaminants comprise tobacco smoke contaminants.
Claim 9
Dependent Claim
14 words
A process according to claim 6 wherein said oxidizing gas contaminants comprise aldehyde contaminants.
Claim 10
Dependent Claim
17 words
A process defined by claim 6 wherein said metal or metal oxide electrode surface is lead dioxide.
Claim 11
Dependent Claim
16 words
A process defined by claim 6 wherein said metal or metal oxide surface is manganese dioxide.
Claim 12
Dependent Claim
22 words
A process defined by claim 6 wherein said surface is lead dioxide on a conductive substrate and said electrolyte is sulfuric acid.
Claim 13
Dependent Claim
27 words
A process defined by claim 6 wherein said positive electrode comprises a lead plate with a surface coat of lead dioxide and said electrolyte is sulfuric acid.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-10-25 | 1975-04-26 | 1975-10-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-10-25 | 1979-04-26 | 1979-10-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-10-25 | 1983-04-26 | 1983-10-26 | $7700.00 | Window Closed / Lapsed |