US3815828A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Imperforate dispenser for dispensing volatile matter as gas and/or vapor to a surrounding atmosphere and method for forming same
Assignee: Porosan Interests USA Inc
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Filing: 1972-07-28
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Granted: 1974-06-11
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Expires: 1992-07-28
Abstract
Abstract This disclosure is directed to an article for dispensing volatile matter as a gas and/or vapor in a chemically unchanged state to the surrounding atmosphere. This is attained by confining either an aqueous emulsion comprising a volatile matter formed with the help of a surfactant and/or pad impregnated or over-saturated with volatile matter in an hermetically sealed, liquid impervious envelope or container formed of a water insoluble vinyl polymer, co-polymer or derivative thereof. The internal walls of the envelope being disposed contiguous the aqueous emulsion or impregnated pad are readily wetted or influenced thereby to result in a gradual yielding of the volatile matter therein through the liquid impervious walls of the envelope as a gas or vapor in a chemically unchanged, dry state to the surrounding atmosphere. To enhance the release of the volatile contained in the aqueous emulsion through the walls of the envelope, the envelope is externally impregnated with an aqueous emulsion of a volatile material formed with the help of a surfactant or emulsifier.
Inventors
- 👤 W Engel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 16:22
CPC Classifications
A; A61; A61L; A61L9/00; A61L9/015; A61L9/04; A61L9/12; D; D06; D06F; D06F58/00; D06F58/20; D06F58/203
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
71 words
An article of manufacture comprising: a liquid impervious envelope formed of a water insoluble vinyl polymer, co-polymer or derivative thereof, a source containing an aqueous emulsion of a volatile matter and a surfactant whereby the volatile matter within said liquid impervious envelop permeates through the liquid impervious wall portions thereof and is thereby gradually released to the surrounding atmosphere as a dry gas, said source being completely enclosed within said envelope.
Claim 2
Dependent Claim
71 words
An article of manufacture comprising: a liquid impervious envelope formed of a water insoluble vinyl polymer, co-polymer or derivative thereof, a source containing an aqueous emulsion of a volatile matter and a surfactant whereby the volatile matter within said liquid impervious envelop permeates through the liquid impervious wall portions thereof and is thereby gradually released to the surrounding atmosphere as a dry gas, said source being completely enclosed within said envelope.
Claim 3
Dependent Claim
27 words
The invention as defined in claim 1 wherein the walls of said envelope are externally impregnated with an aqueous emulsion of a volatile matter and a surfactant.
Claim 4
Dependent Claim
30 words
The invention as defined in claim 2 wherein the aqueous emulsion disposed in said source within the envelope, and impregnated into the external surfaces thereof contains the same volatile matter.
Claim 5
Dependent Claim
30 words
The invention as defined in claim 2 wherein the aqueous emulsion contained in said source within the envelope, and impregnated into the external surface of the envelope include dis-similar volatiles.
Claim 6
Dependent Claim
26 words
The invention as defined in claim 1 wherein said source comprises a pad of material containing said aqueous emulsion of a volatile substance and a surfactant.
Claim 7
Dependent Claim
58 words
The invention as defined in claim 5 wherein said pad is free of the walls of the envelope so that the volatile matter yielding therefrom is free to occupy the space between the pad and the internal wall surfaces of said envelope to permit the volatile matter to permeate through the walls of said envelope as dry matter.
Claim 8
Dependent Claim
45 words
The invention as defined in claim 1 wherein said source comprises a pad formed of foamed plastic selected fromed the group consisting of foamed urethane, foamed vinly, and the polymers, co-polymers and derivatives thereof, impregnated with said aqueous emulsion of a surfactant and volatile substance.
Claim 9
Dependent Claim
19 words
The invention as defined in claim 1 wherein said envelope is formed of a sheet of liquid impervious polyvinylchloride.
Claim 10
Dependent Claim
18 words
The invention as defined in claim 1 wherein volatile matter includes an admixture of non-volatile 2-Ethyl Hexyl Salicylate.
Claim 11
Dependent Claim
28 words
The invention as defined in claim 1 wherein said envelope is formed of a synthetic resin selected from the group consisting of polyvinylchloride, polyvinylacetate, polyvinyl formal, polyvinyl acetal.
Claim 12
Dependent Claim
104 words
An article of manufacture comprising a bag having opposed wall portions, a pocket wall attached to the inner surface of one of said bag wall portions, said pocket wall being formed of a water insoluble vinyl polymer, co-polymer or derivative thereof, said pocket wall being impregnated with an aqueous emulsion of a surfactant and volatile matter, a pad disposed between said pocket wall and wall portion of said bag, said pad containing an aqueous emulsion of a surfactant and volatile matter whereby the volatile matter is gradually yielded through the surface of the pocket wall and to the surrounding atmosphere as a dry gas.
Claim 13
Dependent Claim
104 words
An article of manufacture comprising a bag having opposed wall portions, a pocket wall attached to the inner surface of one of said bag wall portions, said pocket wall being formed of a water insoluble vinyl polymer, co-polymer or derivative thereof, said pocket wall being impregnated with an aqueous emulsion of a surfactant and volatile matter, a pad disposed between said pocket wall and wall portion of said bag, said pad containing an aqueous emulsion of a surfactant and volatile matter whereby the volatile matter is gradually yielded through the surface of the pocket wall and to the surrounding atmosphere as a dry gas.
References Cited (Backward Citations)
US3343664A
Cited
US3578545A
Cited
US3567118A
Cited
US3623659A
Cited
US3702677A
Cited
US3688985A
Cited
US3685734A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-06-10 | 1977-12-10 | 1978-06-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-06-10 | 1981-12-10 | 1982-06-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-06-10 | 1985-12-10 | 1986-06-11 | $7700.00 | Window Closed / Lapsed |