US4379129A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of decomposing ozone
Assignee: Fujifilm Business Innovation Corp
•
Filing: 1980-11-20
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Granted: 1983-04-05
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Expires: 2000-11-20
Abstract
Abstract A catalyst capable of decomposing ozone comprising active carbon with silver deposited on the surfaces thereof.
Inventors
- 👤 Akira Abe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 12:12
CPC Classifications
B; B01; B01J; B01J23/00; B01J23/38; B01J23/48; B01J23/50; B01D; B01D53/00; B01D53/34; B01D53/74; B01D53/86; B01D53/8671; B01D53/8675; G; G03; G03G; G03G21/00; G03G21/20; G03G21/206
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
30 words
A process for decomposing ozone discharged from an electrophotographic duplicating machine, which comprises contacting the discharged ozone with a catalyst comprising active carbon with silver deposited on the surface thereof.
Claim 2
Dependent Claim
30 words
A process for decomposing ozone discharged from an electrophotographic duplicating machine, which comprises contacting the discharged ozone with a catalyst comprising active carbon with silver deposited on the surface thereof.
Claim 3
Dependent Claim
26 words
The process of claim 1, wherein said active carbon is an active carbon having a surface area of about 700 to about 1,500 m 2 /g.
Claim 4
Dependent Claim
34 words
The process of claim 1, wherein the amount of silver deposited on the surfaces of said catalyst ranges from about 0.005 to about 10% by weight based on the weight of the active carbon.
Claim 5
Dependent Claim
17 words
The process of claim 1, wherein said catalyst comprises a bed of said catalyst in particulate form.
Claim 6
Dependent Claim
17 words
The process of claim 1, wherein said catalyst is attached to a fibrous material as a filter.
Claim 7
Dependent Claim
19 words
The process of claim 1, wherein said catalyst is applied to an exhaust duct surface of the duplicating machine.
Claim 8
Dependent Claim
19 words
The process of claim 1, wherein said catalyst is applied to an exhaust fan surface of the duplicating machine.
Claim 9
Dependent Claim
18 words
The process of claim 1, wherein said catalyst is applied to the inner surfaces of a corona discharger.
Claim 10
Dependent Claim
39 words
A process for decomposing ozone contained in exhaust air discharged from an electrophotographic duplicating machine, which comprises passing the ozone-containing air through an ozone decomposing filter containing a catalyst comprising active carbon with silver deposited on the surface thereof.
Claim 11
Dependent Claim
39 words
A process for decomposing ozone contained in exhaust air discharged from an electrophotographic duplicating machine, which comprises passing the ozone-containing air through an ozone decomposing filter containing a catalyst comprising active carbon with silver deposited on the surface thereof.
Claim 12
Dependent Claim
17 words
The process of claim 9, wherein said catalyst comprises a bed of said catalyst in particulate form.
Claim 13
Dependent Claim
17 words
The process of claim 9, wherein said catalyst is attached to a fibrous material as a filter.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-04-04 | 1986-10-04 | 1987-04-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-04-04 | 1990-10-04 | 1991-04-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-04-04 | 1994-10-04 | 1995-04-05 | $7700.00 | Window Closed / Lapsed |