US5350443A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Filter sheet material for passenger cabins in motor vehicles
Assignee: MHB FILTRATION & CO GmbH
•
Filing: 1993-04-19
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Granted: 1994-09-27
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Expires: 2013-04-19
Abstract
Abstract Disclosed is a filter sheet material for passenger cabins in motor vehicles, especially for the removal of unpleasant exhaust fumes, whereby on one and the same air permeable support material, a particle-filtering layer as well as an adsorption filter layer is provided. The adsorptive material in the adsorption filter layer is selected from active carbon particles, activated carbonized carbon particles, molecular sieves, porous polymer adsorbers and carbonized ion-exchangers. The particle filtering layer comprises a micro-fibre agglomeration.
Inventors
- 👤 Hasso von Blucher
- 👤 Ernest de Ruiter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 20:37
CPC Classifications
B; B01; B01J; B01J20/00; B01J20/28; B01J20/28014; B01J20/2803; B01D; B01D39/00; B01D39/08; B01D39/083; B01D53/00; B01D53/02; B01D53/04; B01D53/0407; B01J20/02; B01J20/20; B01J20/28002; B01J20/28004; B01J20/28016; B01J20/28019; B01J20/28028; B01J20/28033; B60; B60H; B60H3/00; B60H3/06; B60H3/0658; B01D2239/00; B01D2239/04; B01D2239/0407; B01D2239/0414; B01D2239/0428; B01D2239/0435; B01D2239/06; B01D2239/0604; B01D2239/0622; B01D2239/065; B01D2239/0654; B01D2239/0668; B01D2239/0681; B01D2239/12; B01D2239/1241; B01D2253/00; B01D2253/10; B01D2253/102; B01D2253/30; B01D2253/302; B01D2253/304; B01D2257/00; B01D2257/90; B01D2259/00; B01D2259/45; B01D2259/4566; B60H2003/0691; Y; Y10; Y10S; Y10S55/00; Y10S55/39
Claims Analysis
Total Claims: 25
Claim 1
Independent Claim
46 words
A filter sheet material for the removal of unpleasant odours in the passenger cabins of motor vehicles, wherein the improvement resides in that on one and the same air-permeable support material a particle filter-layer as well as an adsorption filter layer containing adsorptive material are fixed.
Claim 2
Dependent Claim
46 words
A filter sheet material for the removal of unpleasant odours in the passenger cabins of motor vehicles, wherein the improvement resides in that on one and the same air-permeable support material a particle filter-layer as well as an adsorption filter layer containing adsorptive material are fixed.
Claim 3
Dependent Claim
37 words
A filter material according to claim 1, wherein said adsorption filter layer comprises adsorber particles and the adsorber particles in the adsorption filter layer are fixed at the support material by means of a discontinuously applied adhesive.
Claim 4
Dependent Claim
31 words
A material according to claim 1 or 2, wherein the adsorptive material in the adsorption filter layer are active carbon grains having a diameter of about 0.3 to about 2.0 mm.
Claim 5
Dependent Claim
46 words
A material according to claim 1 or 2, wherein the adsorber particles in the adsorption filter layer is a spherical active carbon on the basis of pitch or on the basis of a carbonized, porous polymer having a diameter of about 0.1 to about 1.0 mm.
Claim 6
Dependent Claim
20 words
A material according to claim 4 wherein the adsorber particles have a diameter of about 0.3 to about 0.8 mm.
Claim 7
Dependent Claim
20 words
A material according to claim 1 or 2, wherein the adsorbing material in the adsorption filter layer are porous polymers.
Claim 8
Dependent Claim
15 words
A material according to claim 6 wherein the porous polymers are based on styrene-divinylbenzene copolymers.
Claim 9
Dependent Claim
29 words
A material according to claim 1 or 2, wherein said adsorption filter layer comprises adsorber particles and the adsorber particles in the adsorption filter layer are hydrophobic molecular seives.
Claim 10
Dependent Claim
40 words
A material according to claim 2, wherein the adhesive is applied by a stencil in the form of a heap having a height of about 0.05 to about 0.5 mm and a diameter of about 0.1 to about 1 mm.
Claim 11
Dependent Claim
15 words
A material according to claim 2, wherein the adhesive consists of a thickened polymer dispersion.
Claim 12
Dependent Claim
39 words
A material according to claim 2, wherein the adhesive consists at least partially of a solvent-free or low solvent containing masked isocyanate pre-polymer which is cross-linked to form a polyurethane by means of a cross-linking agent for the isocyanate.
Claim 13
Dependent Claim
43 words
A material according to claim 2 wherein the adhesive is a mixture of a thickened polymer dispersion and a solvent-free or low solvent containing masked isocyanate pre-polymer which is cross-linked to form a polyurethane by means of a cross-linking agent for the isocyanate.
Claim 14
Dependent Claim
14 words
A material according to claim 2, wherein the adhesive consists of a hot melt.
Claim 15
Dependent Claim
17 words
A material according to claim 1, wherein the support material is a thermal shapable very air-permeable fleece.
Claim 16
Dependent Claim
16 words
A material according to claim 1, wherein the support material is a woven or knitted fabric.
Claim 17
Dependent Claim
28 words
A material according to claim 1, wherein the support material is a woven or knitted fabric which has been made more rigid by use of a thermoplastic resin.
Claim 18
Dependent Claim
19 words
A material according to claim 1, wherein the support material is a lattice work of a thermal shapable plastic.
Claim 19
Dependent Claim
24 words
A material according to claim 1, wherein the support material is a filter paper reinforced by plastic fibres, for use as an air filter.
Claim 20
Dependent Claim
13 words
A material according to claim 18 wherein the plastic fibres are polyester fibres.
Claim 21
Dependent Claim
22 words
A material according to claim 1, wherein the particle filter layer consists of a micro-fibres which are directly applied onto the support.
Claim 22
Dependent Claim
16 words
A material according to claim 20, wherein the micro-fibres are applied by means of the melt-blowing-process.
Claim 23
Dependent Claim
16 words
A material according to claim 20, wherein the micro-fibres comprise electret filter fibres or micro-glass fibres.
Claim 24
Dependent Claim
30 words
A material according to claim 22, wherein the electret filter fibres are made of plastic micro-fibres selected from the group consisting of polysulfone, fluorocarbons, polyvinylchloride, polycarbonate, polyester, polyethylene and polypropylene.
Claim 25
Dependent Claim
15 words
A material according to claim 23, wherein the plastic micro-fibres are polycarbonate- and/or polypropylene micro-fibres.
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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) | 1997-09-26 | 1998-03-28 | 1998-09-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-09-26 | 2002-03-28 | 2002-09-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-09-26 | 2006-03-28 | 2006-09-27 | $7700.00 | Window Closed / Lapsed |