US4604110A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Filter element, filter, and method for removing odors from indoor air
Assignee: Waterbury Companies Inc
•
Filing: 1985-02-28
•
Granted: 1986-08-05
•
Expires: 2005-02-28
Abstract
Abstract An air filter element for removing odors from indoor air having a dry of a mixture of silica gel, activated carbon, and a zeolite. This dry mixture may also be impregnated with a liquid for inhibiting the growth of microorganisms, the liquid being a fungicide/bacteriocide preservative and a polyhydric alcohol, or a grapefruit pulp/polyhydric alcohol reaction product. Also disclosed are novel air filters having these air filter elements and a material for removing particulate matter from indoor air.
Inventors
- 👤 Stephen E. Frazier
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 20:13
CPC Classifications
B; B01; B01D; B01D53/00; B01D53/02; A; A61; A61L; A61L9/00; A61L9/01; F; F24; F24F; F24F1/00; F24F1/0007; F24F1/0071; F24F1/0073; B01D2253/00; B01D2253/10; B01D2253/102; B01D2253/106; B01D2253/108; B01D2253/20; B01D2253/202; B01D2253/30; B01D2253/302; B01D2253/31; B01D2253/34; B01D2253/342; B01D2257/00; B01D2257/90; B01D2257/91; B01D2259/00; B01D2259/40; B01D2259/414; B01D2259/4141; B01D2259/4143; B01D2259/4145; B01D2259/4146; B01D2259/45; B01D2259/4508; B01D53/04; B01D53/0407; B01D53/0446
Claims Analysis
Total Claims: 45
Claim 1
Independent Claim
28 words
An air filter element for removing odors from indoor air consisting essentially of a single layer of a dry mixture of silica gel, activated carbon and a zeolite.
Claim 2
Dependent Claim
28 words
An air filter element for removing odors from indoor air consisting essentially of a single layer of a dry mixture of silica gel, activated carbon and a zeolite.
Claim 3
Dependent Claim
41 words
The indoor air filter element according to claim 1 wherein said mixture comprises from about 10 to 80 weight percent of silica gel, from about 10 to 80 weight percent activated carbon, and from about 10 to 80 weight percent zeolite.
Claim 4
Dependent Claim
22 words
The indoor air filter element according to claim 1 wherein said amounts of silica gel, activated carbon, and zeolite are essentially equal.
Claim 5
Dependent Claim
125 words
The indoor air filter element according to claim 1 wherein said mixture contains a liquid for inhibiting the growth of microorganisms, said liquid comprising: (a) a fungicide/bacteriocide preservative composition in an amount from about 0.5 to 2% by weight of the liquid; (b) at least one polyhydric alcohol, said polyhydric alcohol being present in an amount from about 83 to 99.5% by weight of the liquid; and (c) at least one additional compound for modifying the vapor pressure of said polyhydric alcohol, said additional compound being present in an amount from about 0 to 15% by weight of the liquid, said liquid being present in an amount from about 5 to about 50% by weight of the combined weight of said mixture and said liquid.
Claim 6
Dependent Claim
22 words
The indoor air filter element according to claim 4 wherein said zeolite is zeolite X and said polyhydric alcohol is propylene glycol.
Claim 7
Dependent Claim
22 words
The indoor air filter element of claim 4 wherein said fungicide/bacteriocide preservative composition is captan, quaternary ammonium cosmetic preservatives, parabens, or iodophors.
Claim 8
Dependent Claim
26 words
The indoor air filter element of claim 6 wherein said fungicide/bacteriocide preservative composition is present in an amount of about 1% by weight of said liquid.
Claim 9
Dependent Claim
52 words
The indoor air filter element of claim 4 wherein said liquid further includes a naringen-iron chelate produced from the reaction of naringin in an amount from about 0.1 to 0.2% by weight of the liquid with an iron salt in an amount from about 0.01 to 0.10% by weight of the liquid.
Claim 10
Dependent Claim
32 words
The indoor air filter element of claim 4 wherein said polyhydric alcohol is a combination of propylene glycol, glycerin and tripropylene glycol and further wherein said additional compound is water or glycerine.
Claim 11
Dependent Claim
72 words
The indoor air filter element according to claim 1 wherein said mixture contains a liquid for inhibiting the growth of microorganisms, said liquid comprising the product obtained by contacting grapefruit pulp with a non-toxic polyhydric alcohol to form a reaction product, and separating said reaction product from the pulp residue, said liquid being present in an amount from about 5 to about 50% by weight of the combined weight of said mixture.
Claim 12
Dependent Claim
22 words
The indoor air filter element according to claim 10 wherein said zeolite is zeolite X and said polyhydric alcohol is propylene glycol.
Claim 13
Dependent Claim
52 words
The indoor air filter element of claim 10 wherein said liquid further includes a naringen-iron chelate produced from the reaction of naringen in an amount from about 0.1 to 0.2% by weight of the liquid with an iron salt in an amount from about 0.01 to 0.10% by weight of the liquid.
Claim 14
Dependent Claim
26 words
The indoor air filter element of claim 9 wherein said fungicide/bacteriocide preservative composition is present in an amount of about 1% by weight of said liquid.
Claim 15
Dependent Claim
150 words
An air filter element for removing odors from indoor air consisting essentially of: a. a first layer of silica gel impregnated with a liquid for inhibiting the growth of microorganisms, said liquid comprising: (i) a fungicide/bacteriocide preservative composition in an amount from about 0.5 to 2% by weight of the liquid; (ii) at least one polyhydric alcohol, said polyhydric alcohol being present in an amount from about 83 to 99.5% by weight of the liquid; and (iii) at least one additional compound for modifying the vapor pressure of said polyhydric alcohol, said additional compound being present in an amount from about 0 to 15% by weight of the liquid, said liquid being present in an amount from about 5 to about 50% by weight of the combined weight of said silica gel and said liquid, and b. a dry second layer of zeolite, active carbon, silica gel or mixtures thereof.
Claim 16
Dependent Claim
150 words
An air filter element for removing odors from indoor air consisting essentially of: a. a first layer of silica gel impregnated with a liquid for inhibiting the growth of microorganisms, said liquid comprising: (i) a fungicide/bacteriocide preservative composition in an amount from about 0.5 to 2% by weight of the liquid; (ii) at least one polyhydric alcohol, said polyhydric alcohol being present in an amount from about 83 to 99.5% by weight of the liquid; and (iii) at least one additional compound for modifying the vapor pressure of said polyhydric alcohol, said additional compound being present in an amount from about 0 to 15% by weight of the liquid, said liquid being present in an amount from about 5 to about 50% by weight of the combined weight of said silica gel and said liquid, and b. a dry second layer of zeolite, active carbon, silica gel or mixtures thereof.
Claim 17
Dependent Claim
48 words
The indoor air filter element according to claim 14 wherein the weight of the silica gel in said first layer before impregnation with said liquid ranges from about 1:3 to 3:1 times the weight of the zeolite, active carbon, silica gel or mixtures thereof in said second layer.
Claim 18
Dependent Claim
43 words
The indoor air filter element according to claim 14 wherein the weight of silica gel in said first layer before impregnation with said liquid is essentially equal to the amount of zeolite, active carbon silica gel or mixtures thereof in said second layer.
Claim 19
Dependent Claim
17 words
The indoor air filter element according to claim 14 wherein said first and second layers are separated.
Claim 20
Dependent Claim
24 words
The indoor air filter element according to claim 14 wherein said first and second layers are adjacent in either a vertical or horizontal direction.
Claim 21
Dependent Claim
99 words
An air filter element for removing odors from indoor air consisting essentially of: a. a first layer of silica gel impregnated with a liquid for inhibiting the growth of microorganisms, said liquid comprising the product obtained by contacting grapefruit pulp with a non-toxic polyhydric alcohol to form a reaction product, and separating said reaction product from said pulp residue, said liquid being present in an amount from about 5 to 50% by weight of the combined weight of said silica gel and said liquid; and b. a dry second layer of zeolite, active carbon, silica gel or mixtures thereof.
Claim 22
Dependent Claim
99 words
An air filter element for removing odors from indoor air consisting essentially of: a. a first layer of silica gel impregnated with a liquid for inhibiting the growth of microorganisms, said liquid comprising the product obtained by contacting grapefruit pulp with a non-toxic polyhydric alcohol to form a reaction product, and separating said reaction product from said pulp residue, said liquid being present in an amount from about 5 to 50% by weight of the combined weight of said silica gel and said liquid; and b. a dry second layer of zeolite, active carbon, silica gel or mixtures thereof.
Claim 23
Dependent Claim
48 words
The indoor air filter element according to claim 19 wherein the weight of the silica gel in said first layer before impregnation with said liquid ranges from about 1:3 to 3:1 times the weight of the zeolite, active carbon, silica gel or mixtures thereof in said second layer.
Claim 24
Dependent Claim
43 words
The indoor air filter element according to claim 19 wherein the weight of silica gel in said first layer before impregnation with said liquid is essentially equal to the amount of zeolite, active carbon, silica gel or mixtures thereof in said second layer.
Claim 25
Dependent Claim
17 words
The indoor air filter element according to claim 19 wherein said first and second layers are separated.
Claim 26
Dependent Claim
24 words
The indoor air filter element according to claim 19 wherein said first and second layers are adjacent in either a vertical or horizontal direction.
Claim 27
Dependent Claim
42 words
An air filter element for removing odors and particulate matter from indoor air comprising: (a) a first layer of the air filter element according to claim 1; (b) at least one layer of particulate removal means located adjacent to said first layer.
Claim 28
Dependent Claim
22 words
The indoor air filter element according to claim 24 wherein said particulate removal means is paper, felt, fabric, fiberglass, or plastic foam.
Claim 29
Dependent Claim
18 words
The indoor air filter of claim 25 wherein said plastic foam is polyurethane containing 20 pores per inch.
Claim 30
Dependent Claim
16 words
The indoor air filter of claim 25 wherein said paper is high efficiency air filter paper.
Claim 31
Dependent Claim
28 words
The indoor air filter element according to claim 24 wherein two layers of particulate removal means, one layer located on each side adjacent said first layer, are used.
Claim 32
Dependent Claim
42 words
An air filter element for removing odors and particulate matter from indoor air comprising: (a) a first layer of the air filter element according to claim 4; (b) at least one layer of particulate removal means located adjacent to said first layer.
Claim 33
Dependent Claim
42 words
An air filter element for removing odors and particulate matter from indoor air comprising: (a) a first layer of the air filter element according to claim 10; (b) at least one layer of particulate removal means located adjacent to said first layer.
Claim 34
Dependent Claim
42 words
An air filter element for removing odors and particulate matter from indoor air comprising: (a) a first layer of the air filter element according to claim 14; (b) at least one layer of particulate removal means located adjacent to said first layer.
Claim 35
Dependent Claim
42 words
An air filter element for removing odors and particulate matter from indoor air comprising: (a) a first layer of the air filter element according to claim 19; (b) at least one layer of particulate removal means located adjacent to said first layer.
Claim 36
Dependent Claim
58 words
An air treatment filter for removing odors and particulate matter from indoor air comprising: (a) housing means; (b) at least one filter element according to claim 24; (c) support means for holding the at least one filter element within the housing means; and (d) fan means for directing indoor air into said housing and through said filter element.
Claim 37
Dependent Claim
58 words
An air treatment filter for removing odors and particulate matter from indoor air comprising: (a) housing means; (b) at least one filter element according to claim 29; (c) support means for holding the at least one filter element within the housing means; and (d) fan means for directing indoor air into said housing and through said filter element.
Claim 38
Dependent Claim
58 words
An air treatment filter for removing odors and particulate matter from indoor air comprising: (a) housing means; (b) at least one filter element according to claim 30; (c) support means for holding the at least one filter element within the housing means; and (d) fan means for directing indoor air into said housing and through said filter element.
Claim 39
Dependent Claim
58 words
An air treatment filter for removing odors and particulate matter from indoor air comprising: (a) housing means; (b) at least one filter element according to claim 31; (c) support means for holding the at least one filter element within the housing means, and (d) fan means for directing indoor air into said housing and through said filter element.
Claim 40
Dependent Claim
58 words
An air treatment filter for removing odors and particulate matter from indoor air comprising: (a) housing means; (b) at least one filter element according to claim 32; (c) support means for holding the at least one filter element within the housing means; and (d) fan means for directing indoor air into said housing and through said filter element.
Claim 41
Dependent Claim
25 words
A method for removing odors and particulate matter from indoor air which comprises directing said indoor air through the indoor air filter of claim 33.
Claim 42
Dependent Claim
25 words
A method for removing odors and particulate matter from indoor air which comprises directing said indoor air through the indoor air filter of claim 34.
Claim 43
Dependent Claim
25 words
A method for removing odors and particulate matter from indoor air which comprises directing said indoor air through the indoor air filter of claim 35.
Claim 44
Dependent Claim
25 words
A method for removing odors and particulate matter from indoor air which comprises directing said indoor air through the indoor air filter of claim 36.
Claim 45
Dependent Claim
25 words
A method for removing odors and particulate matter from indoor air which comprises directing said indoor air through the indoor air filter of claim 37.
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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) | 1989-08-04 | 1990-02-03 | 1990-08-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-08-04 | 1994-02-03 | 1994-08-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-08-04 | 1998-02-03 | 1998-08-05 | $7700.00 | Window Closed / Lapsed |