US4954465A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for removing stink
Assignee: Hitachi Ltd
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Filing: 1989-01-11
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Granted: 1990-09-04
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Expires: 2009-01-11
Abstract
Abstract A photocatalystic decomposing apparatus comprises absorbent including honeycomb form active carbon and titanium oxide acting as photocatalyst applied to a surface of the active carbon, and a light source for generating ultraviolet rays exciting the photocatalyst. Stink ingredient is absorbed to the active carbon by passing air flow through openings in the honeycomb, and the absorbed stink ingredient is decomposed by exciting the photocatalyst due to application of the ultraviolet rays.
Inventors
- 👤 Masaei Kawashima
- 👤 Reishi Naka
- 👤 Teruo Tsunoda
- 👤 Nobuyoshi Suenaga
- 👤 Syozo Ogawa
- 👤 Masaaki Kashiwabuchi
- 👤 Miyakichi Kameda
- 👤 Koosuke Tanaka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 03:39
CPC Classifications
A; A61; A61L; A61L9/00; A61L9/16; A61L9/18; A61L9/20; B; B01; B01D; B01D53/00; B01D53/34; B01D53/74; B01D53/86; B01D53/8668; F; F25; F25D; F25D17/00; F25D17/04; F25D17/042; B01D2255/00; B01D2255/80; B01D2255/802; F25D2317/00; F25D2317/04; F25D2317/041; F25D2317/0415; F25D2317/0417; F25D2317/06; F25D2317/068; F25D2317/0681
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
54 words
A stink removing apparatus using absorbent, comprising a member in which photocatalyst is applied on a surface of said absorbent for absorbing stink ingredient or as mixed and kneaded with said absorbent, said photocatalyst decomposing the stink ingredient absorbed on said absorbent when excited by light and a light source for exciting said photocatalyst.
Claim 2
Dependent Claim
54 words
A stink removing apparatus using absorbent, comprising a member in which photocatalyst is applied on a surface of said absorbent for absorbing stink ingredient or as mixed and kneaded with said absorbent, said photocatalyst decomposing the stink ingredient absorbed on said absorbent when excited by light and a light source for exciting said photocatalyst.
Claim 3
Dependent Claim
32 words
A stink removing apparatus according to claim 1, wherein said absorbent is formed as a honeycomb form, and said photocatalyst is excited while passing air flow through apertures of the honeycomb form.
Claim 4
Dependent Claim
45 words
A stink removing apparatus according to claim 1, wherein said absorbent is formed as a honeycomb form, and the stink ingredient is collected by absorbing it to said absorbent while passing air flow through apertures of the honeycomb form, and said photocatalyst is intermittently excited.
Claim 5
Dependent Claim
25 words
A stink removing apparatus according to claim 1, wherein said absorbent comprises simple substance or composite of active carbon, zeolite, porous ceramics or silica gel.
Claim 6
Dependent Claim
30 words
A stink removing apparatus according to claim 1, wherein said photocatalyst comprises simple substance or composite of metallic oxide such as titanium oxide, tungsten oxide, zinc oxide and the like.
Claim 7
Dependent Claim
30 words
A stink removing apparatus according to claim 1, wherein the photocatalyst having a particle diameter sufficiently larger than pores in said absorbent is applied to the surface of said absorbent.
Claim 8
Dependent Claim
26 words
A stink removing apparatus according to claim 1, wherein said exciting source is arranged in the proximity of a high absorbing density area of said absorbent.
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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) | 1993-09-03 | 1994-03-05 | 1994-09-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-09-03 | 1998-03-05 | 1998-09-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-09-03 | 2002-03-05 | 2002-09-04 | $7700.00 | Window Closed / Lapsed |