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US3900428A
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Catalyst for the reduction of nitric oxides
Assignee: WC Heraus GmbH and Co KG
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Filing: 1973-09-07
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Granted: 1975-08-19
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Expires: 1993-09-07
Abstract
Abstract Nitric oxides such as present in automobile exhaust gases are reduced by a catalyst having the formula
Inventors
- 👤 Gerhard Mai
- 👤 Reiner Siepmann
- 👤 Franz Kummer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 19:50
CPC Classifications
B; B01; B01J; B01J23/00; B01J23/70; B01J23/89; B01J23/8933; B01J23/894; B01D; B01D53/00; B01D53/34; B01D53/92; B01D53/94; B01D53/9404; B01D53/9409; B01D53/9413; B01D53/9418; B01J23/76; B01J23/83; B01J23/84; B01J23/847; B01J23/8472; B01D2255/00; B01D2255/10; B01D2255/102; B01D2255/1026; B01D2255/20; B01D2255/206; B01D2255/2063; B01D2255/2068; B01D2255/207; B01D2255/20707; B01D2255/20738; B01D2255/20746; B01D2255/20753; F; F02; F02B; F02B1/00; F02B1/02; F02B1/04; Y; Y10; Y10S; Y10S502/00; Y10S502/525
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
4 words
CATALYST HAVING THE FORMULA:
Claim 2
Dependent Claim
4 words
CATALYST HAVING THE FORMULA:
Claim 3
Dependent Claim
8 words
Catalyst of claim 1 having the formula LaCo1/6Fe1/6Ni1/6Ru1/2O3.
Claim 4
Dependent Claim
8 words
Catalyst of claim 1 having the formula LaFe1/6Ni1/6Co1/6Ru1/6Ti1/3O3.
Claim 5
Dependent Claim
8 words
Catalyst of claim 1 having the formula LaFe1/6Ni1/6Co1/6V1/2O3.
Claim 6
Dependent Claim
8 words
Catalyst of claim 1 having the formula LaFe1/6Ni1/6Co1/6Ti1/2O3.
Claim 7
Dependent Claim
8 words
Catalyst of claim 1 applied to a support.
Claim 8
Dependent Claim
11 words
Catalyst of claim 6 wherein the support has a honeycomb structure.
Claim 9
Dependent Claim
11 words
Catalyst of claim 1 uniformly mixed with a ceramic binding agent.
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) | 1978-08-18 | 1979-02-17 | 1979-08-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-08-18 | 1983-02-17 | 1983-08-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-08-18 | 1987-02-17 | 1987-08-19 | $7700.00 | Window Closed / Lapsed |