US4157787A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Air freshener dispenser
Assignee: Milpak Inc
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Filing: 1977-08-23
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Granted: 1979-06-12
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Expires: 1997-08-23
Abstract
Abstract A package and dispenser for a volatile air-treating or air-freshener material includes a container open at its upper end. A first layer of a porous material is permanently secured to the open end of the container and a second layer of a non-porous material is removably secured to the container over the porous layer. When it is desired to use the container to release vaporized aif-freshener material, the second layer is removed and the remaining porous layer allows the air-freshening vapor to permeate therethrough while at the same time retaining the remaining non-volatized material within the container.
Inventors
- 👤 Burton Schwartz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 00:03
CPC Classifications
A; A61; A61L; A61L9/00; A61L9/015; A61L9/04; A61L9/12; Y; Y10; Y10S; Y10S261/00; Y10S261/88
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
112 words
A dispenser comprising a container for containing therein a material which vaporizes upon exposure to the ambient atmosphere, said container having an opening at its upper end and a peripheral flange surrounding said opening, a first layer of a material having a multiplicity of fine aperatures therein secured to said peripheral flange and covering said opening, and a second nonporous layer, being the same size as said first layer and being releasably secured to an upper surface of said first layer for sealing said aperatures in said first layer, whereby said first layer retains the material within said container and said second layer seals said container to permit storage of said material.
Claim 2
Dependent Claim
112 words
A dispenser comprising a container for containing therein a material which vaporizes upon exposure to the ambient atmosphere, said container having an opening at its upper end and a peripheral flange surrounding said opening, a first layer of a material having a multiplicity of fine aperatures therein secured to said peripheral flange and covering said opening, and a second nonporous layer, being the same size as said first layer and being releasably secured to an upper surface of said first layer for sealing said aperatures in said first layer, whereby said first layer retains the material within said container and said second layer seals said container to permit storage of said material.
Claim 3
Dependent Claim
127 words
A dispenser comprising a container for containing therein a material which vaporizes upon exposure to the ambient atmosphere, said container having an opening at its upper end and a peripheral flange surrounding said opening, a first layer of a material that is porous to the vaporized material secured to said periperhal flange and covering the upper end of said container, and a second nonporous layer releasably secured to and overlying said first layer and effective when in place over said first layer to prevent evaporating material from passing therethrough into the surrounding atmosphere, said first layer being effective when said second layer is at least partially removed therefrom to retain the material in said container while allowing the vaporized material to permeate therethrough into the surrounding atmosphere.
Claim 4
Dependent Claim
127 words
A dispenser comprising a container for containing therein a material which vaporizes upon exposure to the ambient atmosphere, said container having an opening at its upper end and a peripheral flange surrounding said opening, a first layer of a material that is porous to the vaporized material secured to said periperhal flange and covering the upper end of said container, and a second nonporous layer releasably secured to and overlying said first layer and effective when in place over said first layer to prevent evaporating material from passing therethrough into the surrounding atmosphere, said first layer being effective when said second layer is at least partially removed therefrom to retain the material in said container while allowing the vaporized material to permeate therethrough into the surrounding atmosphere.
Claim 5
Dependent Claim
20 words
The dispenser of claim 2, in which said first layer is fixedly secured to the upper perimeter of said container.
Claim 6
Dependent Claim
23 words
The dispenser of claim 2, in which said first layer comprises a sheet of material having a multiplicity of fine openings formed therein.
Claim 7
Dependent Claim
21 words
The dispenser of claim 3, in which said second layer is releasably attached to the upper surface of said first layer.
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) | 1982-06-11 | 1982-12-11 | 1983-06-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-06-11 | 1986-12-11 | 1987-06-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-06-11 | 1990-12-11 | 1991-06-12 | $7700.00 | Window Closed / Lapsed |