Patent US4510193A successfully refreshed from Google Patents.
US4510193A
Expired / Lapsed
US
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Filter sheet material
Assignee: Individual
•
Filing: 1983-05-20
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Granted: 1985-04-09
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Expires: 2003-05-20
Abstract
Abstract A filter sheet material consisting of an air-permeable, pliable, especially textile support which is covered only partially with a uniformly distributed adhesive on which adsorber particles, especially active carbon beads, are fixed and the use of such filter materials containing active carbon as adsorbent for protective suits.
Inventors
- 👤 Hubert Blucher
- 👤 Hasso von Blucher
- 👤 Ernest de Ruiter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 10:17
CPC Classifications
B; B01; B01D; B01D39/00; B01D39/08; B01D39/083; A; A62; A62D; A62D5/00; B01D46/00; B01D46/10; C; C01; C01B; C01B32/00; C01B32/30; C01B32/312; C01B32/318; C01B32/33; C01B32/336; C01B32/354; C01B32/384; B01D2239/00; B01D2239/04; B01D2239/0407; B01D2239/0457; B01D2239/0464; B01D2239/0471; B01D2239/0478; B01D2239/0492; B01D2239/06; B01D2239/065; B01D2239/12; B01D2239/1241; B01D2239/1291; Y; Y10; Y10S; Y10S428/00; Y10S428/911; Y10T; Y10T428/00; Y10T428/24; Y10T428/24802; Y10T428/2481; Y10T428/24826; Y10T428/24942; Y10T428/2495; Y10T428/24967; Y10T428/27; Y10T428/273
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
89 words
A filter sheet material comprising an air-permeable textile material, an adhesive uniformly covering about 20 to 80% of the surface of the textile, the applied adhesive having a height of about 0.05 to 0.5 mm and a diameter or width of about 0.1 to 5 mm, and about 10 to 250 g/m 2 of activated carbon adsorber particles anchored to the textile by the adhesive, the carbon particles having an internal surface of at least about 600 m 2 /g and a diameter of at least about 0.1 mm.
Claim 2
Dependent Claim
89 words
A filter sheet material comprising an air-permeable textile material, an adhesive uniformly covering about 20 to 80% of the surface of the textile, the applied adhesive having a height of about 0.05 to 0.5 mm and a diameter or width of about 0.1 to 5 mm, and about 10 to 250 g/m 2 of activated carbon adsorber particles anchored to the textile by the adhesive, the carbon particles having an internal surface of at least about 600 m 2 /g and a diameter of at least about 0.1 mm.
Claim 3
Dependent Claim
22 words
A filter sheet material according to claim 1, wherein the adhesive is polyurethane and is cross-linked after anchoring of the carbon particles.
Claim 4
Dependent Claim
18 words
A filter sheet material according to claim 1, wherein the adhesive is applied only to the fabric prominences.
Claim 5
Dependent Claim
17 words
A filter sheet material according to claim 1, wherein the adhesive is printed onto the support material.
Claim 6
Dependent Claim
31 words
A filter sheet material according to claim 1, wherein the adhesive is in dot form, the dots of adhesive having the shape of a hemisphere or the form of a cone.
Claim 7
Dependent Claim
33 words
A filter sheet material according to claim 1, wherein the adsorber beads are jacketed in a material that is permeable to chemical warfare agents and which protects the adsorbent agent against external influences.
Claim 8
Dependent Claim
25 words
A filter sheet material according to claim 1, including a flameproofing agent within the adhesive and thereby making entire filter sheet material resistant to flame.
Claim 9
Dependent Claim
15 words
A filter sheet material according to claim 1, including a blowing agent within the adhesive.
Claim 10
Dependent Claim
16 words
A filter sheet material according to claim 1, including encapsulated enzymes affixed on the applied adhesive.
Claim 11
Dependent Claim
23 words
A filter sheet material according to claim 1, including encapsulated enzymes adhered by an adhesive to the other side of the pliable support.
Claim 12
Dependent Claim
18 words
A protective garment formed at least in part of a filter sheet material in accordance with claim 1.
Claim 13
Dependent Claim
38 words
A filter sheet material according to claim 1, wherein the adsorber particles are active carbon beads of an internal surface of about 600 to 1500 m 2 /g and have a diameter of about 0.1 to 1 mm.
Claim 14
Dependent Claim
22 words
A filter sheet material according to claim 12, wherein the active carbon beads are obtained by heating an organic cation ion exchanger.
Claim 15
Dependent Claim
17 words
A filter sheet material according to claim 12, wherein the active carbon beads are made from bitumen.
Claim 16
Dependent Claim
73 words
A filter sheet material according to claim 14, wherein the bitumen is dispersed above its melting point in a liquid which is immiscible or only poorly miscible therewith, and then chilled, whereupon bitumen beads separate from the liquid, the beads are extracted with solvent for the removal of sticky components, impregnated with sulfuric acid, heated to at least 600° C. to produce carbonized carbon beads, and then activating the beads in known manner.
Claim 17
Dependent Claim
43 words
A filter sheet material according to claim 14, wherein molten bitumen is sprayed in an inert gas to form droplets and heated at about 800° to 1600° C., whereupon carbonized carbon beads are obtained, and the beads are then activated in known manner.
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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) | 1988-04-08 | 1988-10-08 | 1989-04-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-04-08 | 1992-10-08 | 1993-04-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-04-08 | 1996-10-08 | 1997-04-09 | $7700.00 | Window Closed / Lapsed |