US4048112A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Catalyst for selective reduction of nitrogen oxides
Assignee: Mitsubishi Chemical Corp
•
Filing: 1976-05-12
•
Granted: 1977-09-13
•
Expires: 1996-05-12
Abstract
Abstract A catalyst for the selective reduction of nitrogen oxides in exhaust gases in the presence of ammonia is vanadium oxide supported on a specific carrier of the anatase form of titanium oxide.
Inventors
- 👤 Kunichi Matsushita
- 👤 Hikaru Sakurada
- 👤 Kazuhiko Onuma
- 👤 Shinichi Fujii
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:20
CPC Classifications
B; B01; B01J; B01J21/00; B01J21/06; B01J21/063; B01D; B01D53/00; B01D53/34; B01D53/74; B01D53/86; B01D53/8621; B01D53/8625; B01D53/8628; B01J23/00; B01J23/16; B01J23/20; B01J23/22
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
33 words
A catalyst for the selective reduction of nitrogen oxides in exhaust gases in the presence of ammonia, which consists of: vanadium oxide supported on a carrier of the anatase form of titanium oxide.
Claim 2
Dependent Claim
33 words
A catalyst for the selective reduction of nitrogen oxides in exhaust gases in the presence of ammonia, which consists of: vanadium oxide supported on a carrier of the anatase form of titanium oxide.
Claim 3
Dependent Claim
38 words
The catalyst of claim 1, wherein said catalyst is prepared by dipping the carrier of the anatase form of titanium oxide in an aqueous solution of vanadium compound and calcining the resulting product at 400° - 700° C.
Claim 4
Dependent Claim
23 words
The catalyst of claim 1, wherein vanadium oxide content is 0.1 - 50 % by weight based on total weight of the catalyst.
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) | 1980-09-12 | 1981-03-14 | 1981-09-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-09-12 | 1985-03-14 | 1985-09-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-09-12 | 1989-03-14 | 1989-09-13 | $7700.00 | Window Closed / Lapsed |