US4677019A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Carbon-containing protective fabrics
Assignee: Individual
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Filing: 1985-05-07
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Granted: 1987-06-30
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Expires: 2005-05-07
Abstract
Abstract A material for protection against chemical pollutants is produced by spraying onto a base fabric a mixture of activated carbon and a polymer binder to produce an open-pored foam structure which does not materially reduce the air permeability. The binder is permeable to the pollutant so the latter can reach the carbon, and the binder is less than 20% of the coating.
Inventors
- 👤 Hubert von Blucher
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 15:14
CPC Classifications
A; A62; A62D; A62D3/00; A62D3/02; A62B; A62B23/00; A62D5/00; B; B01; B01D; B01D39/00; B01D53/00; B01D53/34; B01D53/74; B01D53/84; B01D53/85; B01J; B01J20/00; B01J20/28; B01J20/28002; B01J20/28004; B01J20/28014; B01J20/28026; B01J20/28028; B01J20/2803; B01J20/28033; B01J20/28054; B01J20/28057; B01J20/28095; B01J20/28097; C; C12; C12N; C12N11/00; C12N11/14; A62D2101/00; A62D2101/02; Y; Y02; Y02A; Y02A50/00; Y02A50/20; Y10; Y10T; Y10T428/00; Y10T428/25; Y10T428/30; Y10T442/00; Y10T442/20; Y10T442/2525; Y10T442/30; Y10T442/3325; Y10T442/3366; Y10T442/3374; Y10T442/60; Y10T442/647; Y10T442/652
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
109 words
In a protective material against volatile chemical pollutants, comprising an air permeable flexible carrier layer onto which activated carbon is partially anchored, in uniform distribution, by means of a polymer binder, the improvement comprising utilizing activated carbon particles which have a particle size of from 0.1 to 50 μm and are sheathed with a polymer binder that is permeable to chemical polluants, said binder protecting the activated carbon against undesirable adsorbates, and spraying the activated carbon-binder mixture onto the carrier layer; the coating having a binder component of below 20% by weight, an open-pored structure and reducing the air permeability of the carrier layer by not more than 20%.
Claim 2
Dependent Claim
109 words
In a protective material against volatile chemical pollutants, comprising an air permeable flexible carrier layer onto which activated carbon is partially anchored, in uniform distribution, by means of a polymer binder, the improvement comprising utilizing activated carbon particles which have a particle size of from 0.1 to 50 μm and are sheathed with a polymer binder that is permeable to chemical polluants, said binder protecting the activated carbon against undesirable adsorbates, and spraying the activated carbon-binder mixture onto the carrier layer; the coating having a binder component of below 20% by weight, an open-pored structure and reducing the air permeability of the carrier layer by not more than 20%.
Claim 3
Dependent Claim
16 words
A protective material according to claim 1, wherein the flexible carrier layer is a textile fabric.
Claim 4
Dependent Claim
19 words
A protective material according to claim 1, including enzymes adsorbed in the meso- and micropores of the activated carbon.
Claim 5
Dependent Claim
18 words
A protective material according to claim 3, including immobilized cells which produce said enzymes adsorbed in the pores.
Claim 6
Dependent Claim
19 words
A protective material according to claim 4, wherein the enzymes and/or cells are such as decontaminate phosphoric acid esters.
Claim 7
Dependent Claim
36 words
A protective material according to claim 1, wherein the coating of bonded activated carbon anchored on the carrier layer exhibits a height of from 0.05 to 1 mm and a diameter of from 0.1 to 5.
Claim 8
Dependent Claim
30 words
A protective coating according to claim 1, wherein the binder component in the coating of bonded activated carbon is from 5 to 15 weight percent, based on the activated carbon.
Claim 9
Dependent Claim
19 words
A protective material according to claim 1, carrying from 50 to 250 grams of activated carbon per square meter.
Claim 10
Dependent Claim
19 words
A protective material according to claim 1, wherein the coating of bonded activated carbon includes a flame proofing agent.
Claim 11
Dependent Claim
23 words
A protective material according to claim 1, wherein the coating of bonded activated carbon includes a release agent, levelling agent or impregnating agent.
Claim 12
Dependent Claim
30 words
A protective material according to claim 1, each square meter having from 4 to 100 million points of bonded activated carbon having a diameter of from 0.5 to 0.1 mm.
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) | 1990-06-29 | 1990-12-29 | 1991-06-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-06-29 | 1994-12-29 | 1995-06-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-06-29 | 1998-12-29 | 1999-06-30 | $7700.00 | Window Closed / Lapsed |