US3715322A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Exhaust gas catalyst
Assignee: Mitsui Kinzoku Co Ltd
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Filing: 1970-07-28
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Granted: 1973-02-06
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Expires: 1990-07-28
Abstract
Abstract A catalyst comprising manganese oxides and lead oxides is effective in oxidizing and purifying the exhaust gases containing carbon monoxide and is possessed of combustion facilitating effect, and further, a catalyst comprising said manganese oxides and lead oxides together with an oxide of alkali earth elements, transition elements, rare earth elements or such substance as silicon dioxide, aluminum oxide, or such metals as aluminum, copper and iron is extremely effective in oxidizing and purifying the exhaust gas containing carbon monoxide.
Inventors
- 👤 S Kobayashi
- 👤 K Miyazaki
- 👤 M Yamamoto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 14:57
CPC Classifications
B; B01; B01J; B01J37/00; B01D; B01D53/00; B01D53/34; B01D53/92; B01D53/94; B01D53/944; B01J21/00; B01J23/00; B01J23/16; B01J23/32; B01J23/34; B01J23/70; B01J23/76; B01J23/84; B01J23/889; B01J23/8892; B01J37/0009; Y; Y02; Y02A; Y02A50/00; Y02A50/20
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
70 words
A catalyst composition for substantially oxidizing carbon monoxide in the exhaust gas from a combustion operation, consisting essentially of (a) lead oxide selected from the group consisting of PbO, Pb3O4, Pb2O3, PbO2 and mixtures thereof, and (b) manganese oxide selected from the group consisting of Mn2O3, Mn3O4, MnO2 and mixtures thereof, the weight ratio of a : b being in the range of 10 : 90 to 90 : 10.
Claim 2
Dependent Claim
70 words
A catalyst composition for substantially oxidizing carbon monoxide in the exhaust gas from a combustion operation, consisting essentially of (a) lead oxide selected from the group consisting of PbO, Pb3O4, Pb2O3, PbO2 and mixtures thereof, and (b) manganese oxide selected from the group consisting of Mn2O3, Mn3O4, MnO2 and mixtures thereof, the weight ratio of a : b being in the range of 10 : 90 to 90 : 10.
Claim 3
Dependent Claim
20 words
A catalyst according to claim 1, in which the weight ratio of a : b is about 50 : 50.
Claim 4
Dependent Claim
20 words
A catalyst according to claim 1, in pellet form and containing manganese nitrate or lead nitrate, or both as abinder.
Claim 5
Dependent Claim
21 words
A catalyst according to claim 1, in pellet form and a ceramic binderbonding together the pellets to form a unitary mass.
Claim 6
Dependent Claim
16 words
A catalyst according to claim 1, attached to a metal or ceramic framework as a carrier.
Claim 7
Dependent Claim
112 words
A catalyst composition for substantially oxidizing carbon monoxide in the exhaust gas from a combustion operation, consisting essentially of (a) lead oxide selected from the group consisting of PbO, Pb3O4, Pb2O3, PbO2 and mixtures thereof, (b) manganese oxide selected from the group consisting of Mn2O3, Mn3O4, MnO2 and mixtUres thereof, and (c) at least one material selected from the group consisting of the oxides of alkaline earth metals, transition metals and rare earth metals, copper oxide, silicon dioxide, aluminum oxide, aluminum metal, copper metal and iron metal, the weight ratio of a : b : c being in the range of 10 : 90 : 2-40 to 90 : 10 : 2-40.
Claim 8
Dependent Claim
112 words
A catalyst composition for substantially oxidizing carbon monoxide in the exhaust gas from a combustion operation, consisting essentially of (a) lead oxide selected from the group consisting of PbO, Pb3O4, Pb2O3, PbO2 and mixtures thereof, (b) manganese oxide selected from the group consisting of Mn2O3, Mn3O4, MnO2 and mixtUres thereof, and (c) at least one material selected from the group consisting of the oxides of alkaline earth metals, transition metals and rare earth metals, copper oxide, silicon dioxide, aluminum oxide, aluminum metal, copper metal and iron metal, the weight ratio of a : b : c being in the range of 10 : 90 : 2-40 to 90 : 10 : 2-40.
Claim 9
Dependent Claim
24 words
A catalyst according to claim 6, in which the weight ratio of a : b : c is about 50 : 50 : 5-10.
Claim 10
Dependent Claim
21 words
A catalyst according to claim 6, in pellet form and containing manganese nitrate or lead nitrate, or both as a binder.
Claim 11
Dependent Claim
22 words
A catalyst according to claim 6, in pellet form and a ceramic binder bonding together the pellets to form a unitary mass.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-02-06 | 1976-08-07 | 1977-02-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-02-06 | 1980-08-07 | 1981-02-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-02-06 | 1984-08-07 | 1985-02-06 | $7700.00 | Window Closed / Lapsed |