US4732591A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Air-cleaning apparatus
Assignee: Daido Maruta Finishing Co Ltd
•
Filing: 1987-02-06
•
Granted: 1988-03-22
•
Expires: 2007-02-06
Abstract
Abstract An air-cleaning apparatus presenting an appearance of a flowerpot comprises: a hollow container provided with a ventilating hole in its lower portion and an opening in its upper portion; a fan disposed inside the container; driving means for driving the fan; an air-cleaning filter disposed above the ventilating hole; an air-permeable supporting plate disposed above the fan and the filter; and a natural and/or imitation garden plant mounted on the supporting plate, which plant is covered at its root with an air-permeable filter.
Inventors
- 👤 Yoshimoto Tujisawa
- 👤 Hideo Fukai
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 16:51
CPC Classifications
A; A61; A61L; A61L9/00; A61L9/16; A61L9/015; A61L9/04; A61L9/12; A61L9/122; F; F24; F24F; F24F8/00; F24F8/10; F24F8/108; F24F2221/00; F24F2221/12; F24F8/175
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
116 words
An air-cleaning apparatus presenting an appearance of a flowerpot, comprising: a hollow container provided with a ventilating hole in its lower portion and an opening in its upper portion; a fan provided inside said container at a position above said ventilating hole, for drawing air from the atmosphere and driving said air upward; a driving means for driving said fan; air-cleaning filter means disposed above said ventilating hole at a position above and/or under said fan; an air-permeable supporting plate disposed above said fan and said filter means; and a natural and/or imitation garden plant including a flowering plant, disposed on said supporting plate, said garden plant being covered at its root with an air-permeable filler.
Claim 2
Dependent Claim
116 words
An air-cleaning apparatus presenting an appearance of a flowerpot, comprising: a hollow container provided with a ventilating hole in its lower portion and an opening in its upper portion; a fan provided inside said container at a position above said ventilating hole, for drawing air from the atmosphere and driving said air upward; a driving means for driving said fan; air-cleaning filter means disposed above said ventilating hole at a position above and/or under said fan; an air-permeable supporting plate disposed above said fan and said filter means; and a natural and/or imitation garden plant including a flowering plant, disposed on said supporting plate, said garden plant being covered at its root with an air-permeable filler.
Claim 3
Dependent Claim
28 words
The air-cleaning apparatus as set forth in claim 1, wherein: said container can be partitioned into cubicles at a position between said filter means and said supporting plate.
Claim 4
Dependent Claim
21 words
The air-cleaning apparatus as set forth in claim 1 or 2, wherein: said fan is disposed on said air-permeable supporting plate.
Claim 5
Dependent Claim
25 words
The air-cleaning apparatus as set forth in claim 3, wherein: said supporting plate is made of a reticulated metallic plate or a reticulated plastic plate.
Claim 6
Dependent Claim
33 words
The air-cleaning apparatus as set forth in claim 3, wherein: at least one of activated charcoal, deodorant agents, dust-attracting agents, hygroscopic agents, anti-fungus agents and sterilizing agents is contained in said filter means.
Claim 7
Dependent Claim
18 words
The air-cleaning apparatus as set forth in claim 3, wherein: a moisturizing means is provided inside said container.
Claim 8
Dependent Claim
18 words
The air-cleaning apparatus as set forth in claim 3, wherein: an odoriferous substance is provided inside said container.
Claim 9
Dependent Claim
19 words
The air-cleaning apparatus as set forth in claim 3, wherein: said container is housed in an ornamental outer casing.
Claim 10
Dependent Claim
20 words
The air-cleaning apparatus as set forth in claim 3, wherein: porous small pieces of unglazed-potteries are employed as said filler.
Claim 11
Dependent Claim
27 words
The air-cleaning apparatus as set forth in claim 3, wherein: at least a part of said small pieces of said unglazed-potteries is impregnated with a deodorant agent.
Claim 12
Dependent Claim
24 words
The air-cleaning apparatus as set forth in claim 10, wherein: said deodorant agent comprises a liquid deodorant-component obtained from mainly leaves of theaceous plants.
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) | 1991-03-22 | 1991-09-21 | 1992-03-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-03-22 | 1995-09-21 | 1996-03-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-03-22 | 1999-09-21 | 2000-03-22 | $7700.00 | Window Closed / Lapsed |