US4184983A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Filter material for removal of ozone from the atmosphere
Assignee: Honeywell UOP LLC
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Filing: 1978-03-17
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Granted: 1980-01-22
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Expires: 1998-03-17
Abstract
Abstract Ozone, which may be an irritating factor present in the atmosphere, may be removed therefrom by utilizing, as a filter material, in masks a material comprising at least one metal or metal oxide selected from Group VIII of the Periodic Table, a carbonaceous pyropolymer or combinations thereof composited on a solid support such as an alumina.
Inventors
- 👤 Patricia J. Putz
- 👤 Marie A. Lishka
- 👤 Edwin J. Latos
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 19:13
CPC Classifications
B; B01; B01J; B01J23/00; B01J23/38; B01J23/40; B01J23/46; B01J23/464; B01D; B01D53/00; B01D53/34; B01D53/74; B01D53/86; B01D53/8671; B01D53/8675
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
29 words
A filter material for the removal of ozone from the atmosphere which comprises a combination of platinum and rhodium metal and a carbonaceous pyropolymer composited on a solid support.
Claim 2
Dependent Claim
29 words
A filter material for the removal of ozone from the atmosphere which comprises a combination of platinum and rhodium metal and a carbonaceous pyropolymer composited on a solid support.
Claim 3
Dependent Claim
15 words
The material of claim 1 in which said solid support is an inorganic metal oxide.
Claim 4
Dependent Claim
30 words
The material as set forth in claim 2 in which said inorganic metal oxide is alumina having a surface area of from about 10 to about 500 m 2 /g.
Claim 5
Dependent Claim
14 words
The material as set forth in claim 3 in which said alumina is gamma-alumina.
Claim 6
Dependent Claim
34 words
The material as set forth in claim 1 in which said solid support is a high surface area refractory inorganic oxide containing at least a monolayer of said carbonaceous pyropolymer on the surface thereof.
Claim 7
Dependent Claim
16 words
The material as set forth in claim 5 in which said refractory inorganic oxide is gamma-alumina.
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) | 1983-01-21 | 1983-07-23 | 1984-01-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-01-21 | 1987-07-23 | 1988-01-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-01-21 | 1991-07-23 | 1992-01-22 | $7700.00 | Window Closed / Lapsed |