Patent US4201822A successfully refreshed from Google Patents.
US4201822A
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US
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Novel fabric containing microcapsules of chemical decontaminants encapsulated within semipermeable polymers
Assignee: United States Department of the Army
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Filing: 1979-06-13
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Granted: 1980-05-06
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Expires: 1999-06-13
Abstract
Abstract Novel clothing fabrics containing microcapsules in a resin finish comprising reactive chemical decontamination agents encapsulated within a semipermeable polymer which is selectively permeable to toxic chemical agents but impermeable to the decontamination agents, thereby allowing the toxic chemicals to diffuse into the microcapsules where they undergo irreversible detoxifying chemical reactions.
Inventors
- 👤 Donald R. Cowsar
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:01
CPC Classifications
D; D06; D06M; D06M23/00; D06M23/12; A; A62; A62B; A62B17/00; A62D; A62D5/00; Y; Y10; Y10S; Y10S428/00; Y10S428/905; Y10T; Y10T428/00; Y10T428/249921; Y10T428/249994; Y10T428/25; Y10T428/254; Y10T428/29; Y10T428/2982; Y10T428/2984; Y10T428/2989; Y10T442/00; Y10T442/20; Y10T442/2041; Y10T442/2139; Y10T442/2508; Y10T442/2516
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
59 words
A novel protective garment fabric comprising a (woven) clothing fabric containing microcapsules of decontamination agents for toxic chemical agents encapsulated with a semipermeable polymer wall material which is selectively permeable to toxic chemical agents but impermeable to said decontamination agent, thereby allowing toxic chemicals to diffuse with the microcapsules and undergo an irreversible neutralization reaction with said decontamination agents.
Claim 2
Dependent Claim
59 words
A novel protective garment fabric comprising a (woven) clothing fabric containing microcapsules of decontamination agents for toxic chemical agents encapsulated with a semipermeable polymer wall material which is selectively permeable to toxic chemical agents but impermeable to said decontamination agent, thereby allowing toxic chemicals to diffuse with the microcapsules and undergo an irreversible neutralization reaction with said decontamination agents.
Claim 3
Dependent Claim
26 words
The fabric of claim 1 wherein said microcapsules are uniformly bound to at least one outer surface of the fabric by means of an acrylic binder.
Claim 4
Dependent Claim
21 words
The fabric of claim 1 wherein said microcapsules are uniformly applied to the surface of the fabric within a resin finish.
Claim 5
Dependent Claim
32 words
The fabric of claim 3 wherein the decontamination agents are selected from conventional decontamination agents for neutralization of the toxic chemical agents mustard, i.e., dichlorodiethyl sulfide agent, G agent and V agent.
Claim 6
Dependent Claim
30 words
The fabric of claim 4 wherein the decontamination agents are selected from the group consisting of sodium hydroxide in aqueous solution, monoethanolamine, ethylenediamine, N,N-dichlorodimethylhydantoin, sym-bis(N-chloro-2,4,6-trichlorophenyl)urea, calcium hypochlorite and mixtures thereof.
Claim 7
Dependent Claim
20 words
The fabric of claim 5 wherein the wall materials are selected from the group consisting of ethyl cellulose and polyamides.
Claim 8
Dependent Claim
24 words
The fabric of claim 6 wherein the microcapsules comprise a solution of monoethanolamine and sodium hydroxide decontamination agent encapsulated within a polyamide wall material.
Claim 9
Dependent Claim
30 words
The fabric of claim 6 wherein the microcapsules consist of a decontamination solution of monoethanolamine containing 0.5 molal concentration of the nucleophilic agent 4-(N,N-dimethylamino)pyridine encapsulated within a polyamide wall material.
Claim 10
Dependent Claim
20 words
The fabric of claim 6 wherein the microcapsules comprise a sym-bis(N-chloro-2,4,6-trichlorophenyl)urea decontamination agent encapsulated within an ethyl cellulose wall material.
Claim 11
Dependent Claim
34 words
The fabric of claim 9 wherein the microcapsule consisting of 90% sym-bis(N-chloro-2,4,6-trichlorophenyl)urea and 10% ZnO, by weight, within ethyl cellulose are applied to the fabric at a concentration of 8.2 mg/sq cm of fabric.
References Cited (Backward Citations)
US3427250A
Cited
US4152784A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-05-06 | 1983-11-05 | 1984-05-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-05-06 | 1987-11-05 | 1988-05-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-05-06 | 1991-11-05 | 1992-05-06 | $7700.00 | Window Closed / Lapsed |