Patent US5019434A successfully refreshed from Google Patents.
US5019434A
Expired / Lapsed
US
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Molded slow-release air freshener
Assignee: Soda Aromatic Co Ltd
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Filing: 1989-10-26
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Granted: 1991-05-28
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Expires: 2009-10-26
Abstract
Abstract A molded slow-release air freshener prepared by having a liquid perfume composition absorbed into a porous molded product which has been obtained by partially melt-bonding the particles of an ethylenevinyl acetate copolymer powder with each other to obtain said porous molded product having continuous gas-permeable pores and a bulk density in the range of 0.4 to 0.8 g/cm 3 , said molded slow-release air freshener having an increased apparent volume of at least 1.2 times as large as its apparent volume before the absorption of said liquid perfume composition.
Inventors
- 👤 Yuichi Matsumoto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 19:11
CPC Classifications
A; A61; A61L; A61L9/00; A61L9/015; A61L9/04; A61L9/042; A61L2209/00; A61L2209/10; A61L2209/13; Y; Y10; Y10S; Y10S428/00; Y10S428/905; Y10T; Y10T428/00; Y10T428/13; Y10T428/1352; Y10T428/1397; Y10T428/24; Y10T428/24355; Y10T428/24372; Y10T428/249921; Y10T428/249953; Y10T428/249955; Y10T428/249958; Y10T428/25
Claims Analysis
Total Claims: 47
Claim 1
Independent Claim
95 words
A molded slow-release air freshener prepared by having a liquid perfume composition absorbed into a porous sheet-like product which has been obtained by partially melt-bonding the particles of an ethylene-vinyl acetate copolymer powder in the form of a sheet with each other to obtain said porous sheet-like product having continuous gas-permeable pores and a bulk density in the range of 0.4 to 0.8 g/cm 3 , said molded slow-release air freshener having an increased apparent volume of at least 1.2 times as large as its apparent volume before the absorption of said liquid perfume composition.
Claim 2
Dependent Claim
95 words
A molded slow-release air freshener prepared by having a liquid perfume composition absorbed into a porous sheet-like product which has been obtained by partially melt-bonding the particles of an ethylene-vinyl acetate copolymer powder in the form of a sheet with each other to obtain said porous sheet-like product having continuous gas-permeable pores and a bulk density in the range of 0.4 to 0.8 g/cm 3 , said molded slow-release air freshener having an increased apparent volume of at least 1.2 times as large as its apparent volume before the absorption of said liquid perfume composition.
Claim 3
Dependent Claim
30 words
A molded slow-release air freshener as set forth in claim 1, wherein said ethylene-vinyl acetate copolymer has a vinyl acetate content in the range of 6 to 40% by weight.
Claim 4
Dependent Claim
27 words
A molded slow-release air freshener as set forth in claim 1, wherein said ethylene-vinyl acetate copolymer powder has an average particle diameter not larger than 1 mm.
Claim 5
Dependent Claim
64 words
A molded slow-release air freshener as set forth in claim 2, wherein said liquid perfume composition comprises a perfume or both a perfume and a solvent and its content is not lower than a weight percent corresponding to the weight percent of the vinyl acetate content of said ethylene-vinyl acetate copolymer, and wherein the perfume composition does not remain in said continuous gas-permeable pores.
Claim 6
Dependent Claim
20 words
A molded slow-release air freshener as set forth in claim 1, which is in the form of a hollow hemisphere.
Claim 7
Dependent Claim
98 words
A molded slow-release air freshener comprising: particles of ethylene-vinyl acetate copolymer which have been partially melt-bonded with each other to form a porous sheet-like product, said porous sheet-like product having continuous gas-permeable pores and a bulk density in the range of 0.4 to 0.8 g/cm 3 ; a holder for said porous sheet-like product, said holder being in close-fitting relation to said porous sheet-like product and disposed about a portion of said porous sheet-like product; a liquid perfume composition, said composition being absorbed into said porous sheet-like product and resulting in an expansion of said porous sheet-like product.
Claim 8
Dependent Claim
98 words
A molded slow-release air freshener comprising: particles of ethylene-vinyl acetate copolymer which have been partially melt-bonded with each other to form a porous sheet-like product, said porous sheet-like product having continuous gas-permeable pores and a bulk density in the range of 0.4 to 0.8 g/cm 3 ; a holder for said porous sheet-like product, said holder being in close-fitting relation to said porous sheet-like product and disposed about a portion of said porous sheet-like product; a liquid perfume composition, said composition being absorbed into said porous sheet-like product and resulting in an expansion of said porous sheet-like product.
Claim 9
Dependent Claim
24 words
A molded slow-release air freshener as set forth in claim 6, wherein said porous sheet-like product has a plate-like shape prior to said expansion.
Claim 10
Dependent Claim
18 words
A molded slow-release air freshener as set forth in claim 6, wherein said expansion occurs in three dimensions.
Claim 11
Dependent Claim
20 words
A molded slow release air freshener as set forth in claim 6 wherein said expansion results in a hemispheric shape.
Claim 12
Dependent Claim
32 words
A molded slow-release air freshener as set forth in claim 6 wherein said ethylene vinyl acetate copolymer powder has a vinyl acetate content in the range of 6 to 40% by weight.
Claim 13
Dependent Claim
29 words
A molded slow-release air freshener as set forth in claim 6 wherein said ethylene vinyl acetate copolymer powder has an average particle diameter of no larger than 1 mm.
Claim 14
Dependent Claim
63 words
A molded slow-release air freshener as set forth in claim 6 wherein said liquid perfume composition comprises a perfume or a perfume and a solvent, and its weight percentage is not lower than the weight percentage of the vinyl acetate in said ethylene vinyl acetate copolymer and wherein said liquid perfume composition evaporates, after a period of time, from said continuous gas-permeable pores.
Claim 15
Dependent Claim
117 words
A molded slow-release air freshener comprising: a porous molded product which has a been obtained by partially melt-bonding the particles of an ethylene-vinyl acetate copolymer powder with each other to obtain said porous molded product having continuous gas-permeable pores and a bulk density in the range of 0.4 to 0.8 g/cm 3 ; a holder disposed about a portion of said porous molded product; a liquid perfume composition absorbed into said porous molded product; whereby said porous molded product can be increased to a size of at least 1.06 times greater than it size before the absorption of said liquid perfume composition, and can be three-dimensionally transfigured in appearance after the absorption of said liquid perfume composition.
Claim 16
Dependent Claim
117 words
A molded slow-release air freshener comprising: a porous molded product which has a been obtained by partially melt-bonding the particles of an ethylene-vinyl acetate copolymer powder with each other to obtain said porous molded product having continuous gas-permeable pores and a bulk density in the range of 0.4 to 0.8 g/cm 3 ; a holder disposed about a portion of said porous molded product; a liquid perfume composition absorbed into said porous molded product; whereby said porous molded product can be increased to a size of at least 1.06 times greater than it size before the absorption of said liquid perfume composition, and can be three-dimensionally transfigured in appearance after the absorption of said liquid perfume composition.
Claim 17
Dependent Claim
49 words
A molded slow-release air freshener as set forth in claim 13 wherein the inside of said holder tapers off at an inward angle at least at those portions disposed about said porous molded product, thus permitting the porous molded product to shift toward the vertical direction during the transfiguration.
Claim 18
Dependent Claim
26 words
A molded slow-release air freshener as set forth in claim 13 wherein said holder is a container which engages the perimeter of said porous molded product.
Claim 19
Dependent Claim
38 words
A molded slow-release air freshener as set forth in claim 15 wherein said three-dimensional transfiguration in appearance after the absorption of said liquid perfume composition comprises a hollow space shaped between said porous molded product and said container.
Claim 20
Dependent Claim
70 words
A molded slow-release air freshener as set forth in claim 15 wherein said porous molded product is in the form of a circle-like sheet and said container has a circle-like surrounding wall and a diameter approximating that of said porous molded product, whereby after the absorption of said liquid perfume composition into said porous molded product a hollow hemisphere is formed at least around the center of said circle-like sheet.
Claim 21
Dependent Claim
25 words
A molded slow-release air freshener, as set forth in claim 17 wherein said porous molded product is in the form of an equilateral polygon-like sheet.
Claim 22
Dependent Claim
32 words
A molded slow-release air freshener as set forth in claim 13 wherein said ethylene vinyl acetate copolymer powder has a vinyl acetate content in the range of 6 to 40% by weight.
Claim 23
Dependent Claim
29 words
A molded slow-release air freshener as set forth in claim 13 wherein said ethylene vinyl acetate copolymer powder has an average particle diameter of no larger than 1 mm.
Claim 24
Dependent Claim
63 words
A molded slow-release air freshener as set forth in claim 13 wherein said liquid perfume composition comprises a perfume or a perfume and a solvent, and its weight percentage is not lower than the weight percentage of the vinyl acetate in said ethylene vinyl acetate copolymer and wherein said liquid perfume composition evaporates, after a period of time, from said continuous gas-permeable pores.
Claim 25
Dependent Claim
110 words
A molded slow-release air freshener comprising: an absorbed porous molded product prepared by absorbing a liquid perfume composition into a porous molded product, said porous molded product having an obtained by partially melt-bonding particles of an ethylene vinyl acetate copolymer powder with each other to obtain said porous molded product having continuous gas-permeable pores and a bulk density in the range of 0.4 to 0.8 g/cm 3 ; a holder disposed about a portion of said absorbed, porous molded product; whereby said absorbed, porous molded product has a lengthened apparent size of at least 1.06 times as long as its apparent length before the absorption of said liquid perfume composition.
Claim 26
Dependent Claim
110 words
A molded slow-release air freshener comprising: an absorbed porous molded product prepared by absorbing a liquid perfume composition into a porous molded product, said porous molded product having an obtained by partially melt-bonding particles of an ethylene vinyl acetate copolymer powder with each other to obtain said porous molded product having continuous gas-permeable pores and a bulk density in the range of 0.4 to 0.8 g/cm 3 ; a holder disposed about a portion of said absorbed, porous molded product; whereby said absorbed, porous molded product has a lengthened apparent size of at least 1.06 times as long as its apparent length before the absorption of said liquid perfume composition.
Claim 27
Dependent Claim
35 words
A molded slow-release air freshener as set forth in claim 22 wherein the inside of said holder tapers off at an inward angle at least at those portions disposed about said absorbed, porous molded product.
Claim 28
Dependent Claim
27 words
A molded slow-release air freshener as set forth in claim 22 wherein said holder is a container which engages the perimeter of said absorbed, porous molded product.
Claim 29
Dependent Claim
41 words
A molded slow-release air freshener as set forth in claim 24 wherein a hollow space is shaped between said absorbed porous molded product and said container such that the appearance of said absorbed, porous molded product is transfigured in three dimensions.
Claim 30
Dependent Claim
35 words
A molded slow-release air freshener as set forth in claim 24 wherein said absorbed, porous molded product has the form of a hollow hemisphere at least around the center of said absorbed, porous molded product.
Claim 31
Dependent Claim
32 words
A molded slow-release air freshener as set forth in claim 22 wherein said ethylene vinyl acetate copolymer powder has a vinyl acetate content in the range of 6 to 40% by weight.
Claim 32
Dependent Claim
29 words
A molded slow-release air freshener as set forth in claim 22 wherein said ethylene vinyl acetate copolymer powder has an average particle diameter of no larger than 1 mm.
Claim 33
Dependent Claim
63 words
A molded slow-release air freshener as set forth in claim 22 wherein said liquid perfume composition comprises a perfume or a perfume and a solvent, and its weight percentage is not lower than the weight percentage of the vinyl acetate in said ethylene vinyl acetate copolymer and wherein said liquid perfume composition evaporates, after a period of time, from said continuous gas-permeable pores.
Claim 34
Dependent Claim
92 words
A process for producing a molded slow-release air freshener, which comprises: providing an ethylene-vinyl acetate copolymer powder in the form of a sheet; heating said powder and thereby allowing the powder particles of said ethylene-vinyl acetate copolymer to be partially melt-bonded with each other to prepare a porous sheet having continuous gas-permeable pores and a bulk density in the range of 0.4 to 0.8 g/cm 3 ; and impregnating, in a container, at least part of said porous sheet with a liquid perfume composition, said container disposed about said porous sheet wall.
Claim 35
Dependent Claim
92 words
A process for producing a molded slow-release air freshener, which comprises: providing an ethylene-vinyl acetate copolymer powder in the form of a sheet; heating said powder and thereby allowing the powder particles of said ethylene-vinyl acetate copolymer to be partially melt-bonded with each other to prepare a porous sheet having continuous gas-permeable pores and a bulk density in the range of 0.4 to 0.8 g/cm 3 ; and impregnating, in a container, at least part of said porous sheet with a liquid perfume composition, said container disposed about said porous sheet wall.
Claim 36
Dependent Claim
44 words
A process as set forth in claim 30, wherein said heating is performed using a constant temperature bath at a temperature in the range of the melting point of the ethylene-vinyl acetate copolymer used minus 7° C. to said melting point plus 4° C.
Claim 37
Dependent Claim
16 words
A process as set forth in claim 30, wherein said container has a circular surface shape.
Claim 38
Dependent Claim
25 words
A process as set forth in claim 30, wherein said container has a surface area about the same as the surface area of said sheet.
Claim 39
Dependent Claim
18 words
A process as set forth in claim 30, wherein said heating takes place without the application of pressure.
Claim 40
Dependent Claim
127 words
A process for producing a molded slow-release air freshener which comprises: placing ethylene vinyl acetate copolymer powder in the form of a sheet; heating said powder thereby allowing the particles of said ethylene vinyl acetate copolymer powder to be partially melt-bonded with each other to obtain a porous sheet having continuous gas-permeable pores and a bulk density in the range of 0.4 to 0.8 g/cm 3 ; cutting at least part of said porous sheet to a desired shape; and impregnating, in a container, said porous sheet with a liquid perfume composition, said container having a surrounding wall and being of a size approximately that of said shaped porous sheet so as to be in close-fitting relationship with at least two portions of said shaped porous sheet.
Claim 41
Dependent Claim
127 words
A process for producing a molded slow-release air freshener which comprises: placing ethylene vinyl acetate copolymer powder in the form of a sheet; heating said powder thereby allowing the particles of said ethylene vinyl acetate copolymer powder to be partially melt-bonded with each other to obtain a porous sheet having continuous gas-permeable pores and a bulk density in the range of 0.4 to 0.8 g/cm 3 ; cutting at least part of said porous sheet to a desired shape; and impregnating, in a container, said porous sheet with a liquid perfume composition, said container having a surrounding wall and being of a size approximately that of said shaped porous sheet so as to be in close-fitting relationship with at least two portions of said shaped porous sheet.
Claim 42
Dependent Claim
48 words
A process as set forth in claim 35 wherein said heating is performed using a constant temperature bath at a temperature in a range of the melting point of said ethylene vinyl acetate copolymer from 7° C. below said melting point to 4° C. above said melting point.
Claim 43
Dependent Claim
16 words
A process as set forth in claim 35 wherein said container has a circular surface shape.
Claim 44
Dependent Claim
28 words
A process as set forth in claim 35 further comprising a support upon which the ethylene vinyl acetate copolymer powder is placed in the form of a sheet.
Claim 45
Dependent Claim
14 words
A process as set forth in claim 38 wherein the support is a plate.
Claim 46
Dependent Claim
14 words
A process as set forth in claim 38 wherein the support is a belt.
Claim 47
Dependent Claim
13 words
A process as set forth in claim 38 wherein the support is heated.
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) | 1994-05-27 | 1994-11-26 | 1995-05-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-05-27 | 1998-11-26 | 1999-05-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-05-27 | 2002-11-26 | 2003-05-28 | $7700.00 | Window Closed / Lapsed |