EP0145849A1
Expired / Lapsed
EP
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Filter paper
Assignee: Wyeth Holdings LLC
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Filing: 1984-09-04
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Granted: —
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Expires: 2004-09-04
Abstract
Abstract A toxic vapour absorptive nonwoven filter material comprising a wet-laid sheet containing fibrillated binder fibre, active carbon in fibre or particle form and submicron diameter glass fibre. The surface of the filter material may by treated with a hydrophobic or an oleophobic agent.
Inventors
- 👤 Robert Domenico Giglia
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-08 15:15
CPC Classifications
B; B01; B01D; B01D39/00; B01D39/14; B01D39/20; B01D39/2055; B01D39/2058; B01D39/2062; A; A62; A62B; A62B23/00; A62D; A62D9/00; B01D39/2003; B01D39/2017; B01D39/2024; B01D39/2065; D; D21; D21H; D21H13/00; D21H13/10; D21H13/12; D21H13/18; D21H13/36; D21H13/38; D21H13/40; D21H13/46; D21H13/50; D21H17/00; D21H17/63; D21H17/67; D21H27/00; D21H27/08; B01D2239/00; B01D2239/04; B01D2239/0414; B01D2239/0428; B01D2239/06; B01D2239/0604; B01D2239/064; B01D2239/08; B01D2239/086; B01D2239/12; B01D2239/1225; B01D2239/1241; Y; Y10; Y10S; Y10S428/00; Y10S428/903; Y10T; Y10T428/00; Y10T428/31504; Y10T428/3154; Y10T442/00; Y10T442/20; Y10T442/2164; Y10T442/2172; Y10T442/2189; Y10T442/60; Y10T442/697
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
24 words
A high efficiency, toxic vapor absorptive, non-woven filter material comprising a wet-laid sheet containing fibrillated binder fiber, active carbon and submicron size glass fiber.
Claim 2
Dependent Claim
24 words
A high efficiency, toxic vapor absorptive, non-woven filter material comprising a wet-laid sheet containing fibrillated binder fiber, active carbon and submicron size glass fiber.
Claim 3
Dependent Claim
55 words
The filter material of Claim 1 wherein the concentration of fibrillated binder fiber ranges from about 2-20%, by weight, based on the total weight of the material, the concentration of active carbon ranges from about 30-80%, by weight, same basis, and the concentration of the submicron size glass fiber ranges from about 10-50%, same basis.
Claim 4
Dependent Claim
17 words
The filter material of Claim 1 wherein the active carbon is in the form of a fiber.
Claim 5
Dependent Claim
16 words
The filter material of Claim 1 wherein the active carbon is in the form of particles.
Claim 6
Dependent Claim
12 words
The filter material of Claim 1 wherein the binder is acrylic fiber.
Claim 7
Dependent Claim
19 words
The filter material of Claim 1 wherein the surface thereof is treated with a hydrophobic and/or an oleophobic agent.
Claim 8
Dependent Claim
12 words
The filter material of Claim 6 wherein the agent is 1,1-dihydropentadecafluorooctyl methacrylate.
Claim 9
Dependent Claim
17 words
The filter material of Claim 1 wherein the active carbon is a blend of fiber and particles.
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