US5221649A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Catalysts and methods for ozone decomposition
Assignee: Sakai Chemical Industry Co Ltd
•
Filing: 1992-02-21
•
Granted: 1993-06-22
•
Expires: 2012-02-21
Abstract
Abstract A catalyst for ozone decomposition which comprises: (a) at least one selected from the group consisting of clay and carbon; (b) manganese dioxide; and optionally (c) titanium dioxide; and/or (d) at least one oxide of a metal selected from the group consisting of Cu, Co, Fe, Ni and Ag. A further catalyst for ozone decomposition which comprises: (a) at least one oxide of a metal selected from the group consisting of alkali metals and alkaline earth metals; (b) manganese dioxide; and optionally (c) titanium dioxide; and/or (d) at least one selected from the group consisting of clay and carbon.
Inventors
- 👤 Masafumi Yoshimoto
- 👤 Tadao Nakatsuji
- 👤 Kazuhiko Nagano
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 09:45
CPC Classifications
B; B01; B01J; B01J23/00; B01J23/16; B01J23/32; B01J23/34; B01D; B01D53/00; B01D53/34; B01D53/74; B01D53/86; B01D53/8671; B01D53/8675; B01J23/38; B01J23/54; B01J23/66; B01J23/68; B01J23/688; B01J23/70; B01J23/76; B01J23/84; B01J23/889; B01J23/8892
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
38 words
A catalyst structure for ozone decomposition which comprises a catalyst comprising clay, manganese dioxide and at least one oxide of a metal selected from the group consisting of Co, Ni and Ag, supported on an inactive carrier material.
Claim 2
Dependent Claim
38 words
A catalyst structure for ozone decomposition which comprises a catalyst comprising clay, manganese dioxide and at least one oxide of a metal selected from the group consisting of Co, Ni and Ag, supported on an inactive carrier material.
Claim 3
Dependent Claim
69 words
The catalyst structure as claimed in claim 1, wherein the catalyst comprises 10-50% by weight of clay, 20-90% by weight of manganese dioxide and at least one oxide of a metal selected from the group consisting of Co, Ni and Ag, wherein the amount of said at least one oxide is 1-30% by weight based on the total amount of the manganese oxide and said at least one oxide.
Claim 4
Independent Claim
58 words
A method of producing a catalyst structure for ozone decomposition which comprises immersing an inactive carrier material in a slurry of a catalyst comprising clay, manganese dioxide and at least one oxide of a metal selected from the group consisting of Co, Ni and Ag, and drying the carrier material to support the catalyst on the carrier material.
Claim 5
Independent Claim
58 words
A method of producing a catalyst structure for ozone decomposition which comprises immersing an inactive carrier material in a slurry of a catalyst comprising clay, manganese dioxide and at least one oxide of a metal selected from the group consisting of Co, Ni and Ag, and drying the carrier material to support the catalyst on the carrier material.
Claim 6
Dependent Claim
68 words
The method as claimed in claim 3, wherein the catalyst comprises 10-50% by weight of clay, 20-90% by weight of manganese dioxide and at least one oxide of a metal selected from the group consisting of Co, Ni and Ag, wherein the amount of said at least one oxide is 1-30% by weight based on the total amount of the manganese oxide and said at least one oxide.
References Cited (Backward Citations)
US3361531A
Cited
DE1966535A1
Cited
JPS4994591A
Cited
SU472675A1
Cited
JPS5275686A
Cited
US4379129A
Cited
DE2748471A1
Cited
JPS5387972A
Cited
SU617369A1
Cited
JPS542288A
Cited
JPS54119371A
Cited
JPS5750527A
Cited
JPS5771623A
Cited
JPS57136940A
Cited
EP0275620A2
Cited
JPS6456123A
Cited
JPH02201648A
Cited
EP0398766A1
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1996-06-21 | 1996-12-21 | 1997-06-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-06-21 | 2000-12-21 | 2001-06-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-06-21 | 2004-12-21 | 2005-06-22 | $7700.00 | Window Closed / Lapsed |