US4254910A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Package for the controlled release of volatile substances
Assignee: Reynolds Metals Co
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Filing: 1979-10-11
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Granted: 1981-03-10
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Expires: 1999-10-11
Abstract
Abstract A packaging system for the controlled release of volatile substances is disclosed. This packaging system comprises a pair of outer vapor-impermeable barrier layers and a vapor-permeable central layer which is bonded to each of the pair of vapor-impermeable outer layers, with the volatile material being contained between the central vapor-permeable layer and each of the outer vapor-impermeable barrier layers. The central vapor-permeable layer is formed from a pair of vapor-permeable webs which are bonded to one another. The strength of the bond holding the vapor-permeable webs together is less than the strength of the bond between the vapor-permeable central layer and each of the outer vapor-impermeable barrier layers such that upon exerting a separating force on the outer vapor-impermeable barrier layers the central vapor-permeable webs will split, forming a pair of vapor-permeating members.
Inventors
- 👤 James P. Martin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 04:57
CPC Classifications
A; A61; A61L; A61L9/00; A61L9/015; A61L9/04; A61L9/12; A61L9/01; Y; Y10; Y10S; Y10S428/00; Y10S428/905
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
100 words
A package comprising a pair of substantially similar pockets each having a volatile substance therein, said package comprising a pair of outer vapor-impermeable layers and a central vapor-permeable layer bonded along edge regions thereof to each of said vapor-impermeable layers to form said pair of pockets, said volatile material being positioned in each pocket between said central vapor-permeable layer and each said outer vapor-impermeable layer, said central vapor-permeable layer comprising a pair of bonded together vapor-permeable webs, the bond strength between said vapor-permeable webs being less than the bond strength between said central vapor-permeable layer and said outer vapor-impermeable layers.
Claim 2
Dependent Claim
100 words
A package comprising a pair of substantially similar pockets each having a volatile substance therein, said package comprising a pair of outer vapor-impermeable layers and a central vapor-permeable layer bonded along edge regions thereof to each of said vapor-impermeable layers to form said pair of pockets, said volatile material being positioned in each pocket between said central vapor-permeable layer and each said outer vapor-impermeable layer, said central vapor-permeable layer comprising a pair of bonded together vapor-permeable webs, the bond strength between said vapor-permeable webs being less than the bond strength between said central vapor-permeable layer and said outer vapor-impermeable layers.
Claim 3
Dependent Claim
17 words
The package of claim 1 wherein said outer vapor-impermeable webs include an unbonded edge or lip region.
Claim 4
Dependent Claim
18 words
The package of claim 1 wherein said outer vapor-impermeable layers are formed of a vapor-impermeable plastics resin film.
Claim 5
Dependent Claim
21 words
The package of claim 1 wherein said outer vapor-impermeable layers are formed of a plastics resin film-metallic foil-plastics resin film laminate.
Claim 6
Dependent Claim
15 words
The package of claim 4 wherein said laminate is a polyester film-aluminum foil-polyethylene film laminate.
Claim 7
Dependent Claim
20 words
The package of claim 1 wherein said central vapor-permeable layer is formed from a pair of bonded nonwoven rayon webs.
Claim 8
Dependent Claim
16 words
The package of claim 1 wherein said outer vapor-impermeable layers include an adhesive fastening means thereon.
Claim 9
Dependent Claim
13 words
The package of claim 7 wherein said adhesive fastening means comprises a tape.
Claim 10
Dependent Claim
13 words
The package of claim 1 wherein said volatile substance is an air deoderizer.
Claim 11
Dependent Claim
15 words
The package of claim 9 wherein said air deoderizer is formed from scented urea beads.
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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) | 1984-03-09 | 1984-09-08 | 1985-03-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-03-09 | 1988-09-08 | 1989-03-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-03-09 | 1992-09-08 | 1993-03-10 | $7700.00 | Window Closed / Lapsed |