US4500581A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Material for protecting human bodies from harmful or poisonous chemical substance
Assignee: Boseki KK
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Filing: 1982-03-19
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Granted: 1985-02-19
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Expires: 2002-03-19
Abstract
Abstract A protective material comprising a cloth layer wherein the apparent density at one of the surfaces is smaller than that of the entire body of the cloth layer and a layer of active carbon integrally provided on the other surface of the cloth layer.
Inventors
- 👤 Takeshi Mitomi
- 👤 Eiji Yoshimura
- 👤 Hideki Komagata
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 04:11
CPC Classifications
B; B32; B32B; B32B5/00; B32B5/22; B32B5/24; B32B5/26; A; A62; A62D; A62D5/00; B32B5/02; B32B5/026; B32B5/14; D; D06; D06M; D06M11/00; D06M11/73; D06M11/74; D06N; D06N3/00; D06N3/0002; D06N3/004; B32B2262/00; B32B2262/10; B32B2262/106; B32B2317/00; B32B2317/10; Y; Y10; Y10T; Y10T428/00; Y10T428/23907; Y10T428/23986; Y10T428/24; Y10T428/24942; Y10T428/24992; Y10T428/30; Y10T442/00; Y10T442/30; Y10T442/3472; Y10T442/3504; Y10T442/3512; Y10T442/352
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
122 words
A protective material, adapted to protect human bodies from chemical substances, comprising (A) a cloth layer having a buffed or piled surface layer which is adapted to prevent a chemical substance in a liquid state from penetrating the cloth layer and which has an apparent density (according to the formula: D=W/100×T, where D is the apparent density of the layer being measured (g/cm 3 ), W is the weight of the layer being measured, and T is the thickness of the layer being measured (mm)) smaller than that of the entire body of the cloth layer, and (B) an active carbon layer adapted to absorb a chemical substance in a gaseous state integrally provided on the other surface of the cloth layer.
Claim 2
Dependent Claim
122 words
A protective material, adapted to protect human bodies from chemical substances, comprising (A) a cloth layer having a buffed or piled surface layer which is adapted to prevent a chemical substance in a liquid state from penetrating the cloth layer and which has an apparent density (according to the formula: D=W/100×T, where D is the apparent density of the layer being measured (g/cm 3 ), W is the weight of the layer being measured, and T is the thickness of the layer being measured (mm)) smaller than that of the entire body of the cloth layer, and (B) an active carbon layer adapted to absorb a chemical substance in a gaseous state integrally provided on the other surface of the cloth layer.
Claim 3
Dependent Claim
21 words
The protective material according to claim 1, wherein the surface of the cloth layer having a smaller apparent density is buffed.
Claim 4
Dependent Claim
21 words
The protective material according to claim 1, wherein the surface of the cloth layer having a smaller apparent density is piled.
Claim 5
Dependent Claim
19 words
The protective material according to claim 1, wherein the cloth layer is provided with a water and oil repellency.
Claim 6
Dependent Claim
15 words
The protective material according to claim 1, wherein the cloth layer comprises a two-layered structure.
Claim 7
Dependent Claim
44 words
The protective material according to claim 1, wherein the apparent density of the entire body of the cloth layer is 0.08 to 0.30 g/cm 3 and the apparent density of the surface having a smaller apparent density is 0.05 to 0.20 g/cm 3 .
Claim 8
Dependent Claim
44 words
The protective material according to claim 6, wherein the apparent density of the entire body of the cloth layer is 0.10 to 0.25 g/cm 3 and the apparent density of the surface having a smaller apparent density is 0.07 to 0.15 g/cm 3 .
Claim 9
Dependent Claim
19 words
The protective material according to claim 1, which has a weight of not more than 500 g/m 2 .
Claim 10
Dependent Claim
19 words
The protective material according to claim 8, which has a weight of not more than 300 g/m 2 .
Claim 11
Dependent Claim
17 words
The protective material according to claim 1, which has a thickness of not more than 3 mm.
Claim 12
Dependent Claim
17 words
The protective material according to claim 10, which has a thickness of not more than 2 mm.
Claim 13
Dependent Claim
19 words
The protective material according to claim 1, wherein the cloth layer has a thickness of 0.3 to 2.8 mm.
Claim 14
Dependent Claim
27 words
The protective material according to claim 1, wherein the surface of the cloth layer having a smaller apparent density has a thickness of 0.1 to 2.6 mm.
Claim 15
Dependent Claim
20 words
The protective material according to claim 1, which has a gas permeability of not less than 500 ml/cm 2 /min.
Claim 16
Dependent Claim
23 words
The protective material according to claim 1, wherein the cloth layer has a gas permeability of not less than 700 ml/cm 2 /min.
Claim 17
Dependent Claim
18 words
The protective material according to claim 1, wherein the active carbon layer is constituted with active carbon fiber.
Claim 18
Dependent Claim
17 words
The protective material according to claim 16, wherein the active carbon fiber is in a knitted state.
Claim 19
Dependent Claim
24 words
The protective material according to claim 16, wherein the active carbon fiber has a specific surface area of 600 to 2,500 m 2 /g.
Claim 20
Dependent Claim
23 words
The protective material according to claim 1, wherein the active carbon layer has a gas permeability of not more 15,000 ml/cm 2 /min.
Claim 21
Dependent Claim
20 words
The protective material according to claim 1, wherein the active carbon layer has a thickness of 0.2 to 2.7 mm.
Claim 22
Dependent Claim
30 words
The protective material according to claim 1, which further comprises a synthetic fiber cloth layer on the cloth layer and a natural fiber cloth layer on the active carbon 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) | 1988-02-19 | 1988-08-20 | 1989-02-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-02-19 | 1992-08-20 | 1993-02-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-02-19 | 1996-08-20 | 1997-02-19 | $7700.00 | Window Closed / Lapsed |