Patent US4256711A successfully refreshed from Google Patents.
US4256711A
Expired / Lapsed
US
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Catalysis
Assignee: Johnson Matthey PLC
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Filing: 1978-10-04
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Granted: 1981-03-17
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Expires: 1998-10-04
Abstract
Abstract This invention relates to catalysts and more particularly to the catalyst decomposition of one or more oxides of nitrogen present in a gas stream by contacting the gas with a catalyst comprising a compound of the formula A x B y , where A is selected from the group consisting of Tl, Zr, Hf, V, Nb, Ta, Cr, Mo, W, Th, and U, B is selected from the group consisting of B, C, N and Si, x has a value 1≦x≦7 and y has a value 1≦y≦4.
Inventors
- 👤 Paul A. Sermon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 21:37
CPC Classifications
B; B01; B01J; B01J21/00; B01D; B01D53/00; B01D53/34; B01D53/74; B01D53/86; B01D53/8621; B01D53/8625; B01D53/8628; B01J27/00; B01J27/20; B01J27/22; B01J27/24
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
24 words
A method for the decomposition of NO present in a gas stream which comprises contacting the gas with a catalyst consisting essentially of TiN.
Claim 2
Independent Claim
24 words
A method for the decomposition of NO present in a gas stream which comprises contacting the gas with a catalyst consisting essentially of TiN.
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) | 1984-03-16 | 1984-09-15 | 1985-03-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-03-16 | 1988-09-15 | 1989-03-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-03-16 | 1992-09-15 | 1993-03-17 | $7700.00 | Window Closed / Lapsed |