Patent US4421533A successfully refreshed from Google Patents.
US4421533A
Expired / Lapsed
US
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Method of removing ozone and composition therefor
Assignee: Takeda Pharmaceutical Co Ltd
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Filing: 1982-03-24
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Granted: 1983-12-20
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Expires: 2002-03-24
Abstract
Abstract Compositions comprising (1) manganese compound and (2) one kind or not less than two kinds out of alkali metal and/or alkaline earth metal compounds being supported on activated carbon. Contacting an ozone-containing gas with the said compositions results in highly effective decomposition and removal of ozone contained in the gas. The capability for removing ozone of the compositions is lasting over a long period of time.
Inventors
- 👤 Hiroshi Nishino
- 👤 Masayuki Suzuki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 09:14
CPC Classifications
B; B01; B01J; B01J27/00; B01J27/24; B01J27/25; B01D; B01D53/00; B01D53/34; B01D53/74; B01D53/86; B01D53/8671; B01D53/8675; Y; Y10; Y10S; Y10S95/00; Y10S95/90; Y10S95/901
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
76 words
A method for removing ozone from an ozone-containing gas which comprises contacting an ozone-containing gas with an activated carbon composition supported with (1) about 0.1 to 10 parts by weight as Mn based on 100 parts by weight of activated carbon of a manganese nitrate and (2) about 0.1 to 10 parts by weight as a metal element based on 100 parts by weight of activated carbon of sodium nitrate, potassium nitrate or a mixture thereof.
Claim 2
Independent Claim
76 words
A method for removing ozone from an ozone-containing gas which comprises contacting an ozone-containing gas with an activated carbon composition supported with (1) about 0.1 to 10 parts by weight as Mn based on 100 parts by weight of activated carbon of a manganese nitrate and (2) about 0.1 to 10 parts by weight as a metal element based on 100 parts by weight of activated carbon of sodium nitrate, potassium nitrate or a mixture thereof.
Claim 3
Dependent Claim
34 words
A method for removing ozone according to claim 1, wherein the activated carbon compositions supported with (1) manganese nitrate and (2) sodium or potassium nitrate are ones which have never been subjected to burning.
Claim 4
Dependent Claim
33 words
A method for removing ozone according to claim 1, wherein the activated carbon compositions supported with (1) manganese nitrate and (2) sodium or potassium nitrate are ones which have been subjected to burning.
Claim 5
Dependent Claim
45 words
A method for removing ozone according to claim 1, wherein the ozone-containing gas is treated with an activated carbon having a high absorption capability prior to contacting said gas with the activated carbon compositions supported with (1) manganese nitrate and (2) sodium or potassium nitrate.
Claim 6
Dependent Claim
17 words
A method for removing ozone according to claim 1, wherein the activated carbon compositions further contain clay.
Claim 7
Dependent Claim
48 words
A method for removing ozone according to claim 1, wherein the ozone-containing gas is treated with an activated carbon composition as defined in claim 11 and further containing clay, prior to contacting with an activated carbon composition supported with (1) manganese nitrate and (2) sodium or potassium nitrate.
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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) | 1986-12-19 | 1987-06-20 | 1987-12-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-12-19 | 1991-06-20 | 1991-12-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-12-19 | 1995-06-20 | 1995-12-20 | $7700.00 | Window Closed / Lapsed |