US5320096A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Filtering device and the use thereof
Assignee: Gibeck Respiration AB
•
Filing: 1992-12-18
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Granted: 1994-06-14
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Expires: 2012-12-18
Abstract
Abstract A filtering device for connection to the respiratory tract of a person and comprising a cover (1) enclosing a heat and moisture exchanging material and a bacteria absorbing filter which consists of a folded, air-permeable sheet material. The heat and moisture exchanging material is formed as strips (9) inserted in the pleats of the sheet material (8).
Inventors
- 👤 Lambert Hans
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 19:14
CPC Classifications
A; A61; A61M; A61M16/00; A61M16/10; A61M16/1045; A61M16/105; A61M16/1055; A61M16/106; Y; Y10; Y10S; Y10S55/00; Y10S55/35
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
109 words
A filtering device for connection to the respiratory tract of a person and comprising a cover enclosing separate strips of a heat and moisture exchanging material and a bacteria absorbing filter which consists of a folded, air-permeable pleated sheet material, the strips of heat and moisture exchanging material being disposed in a plurality of the pleats of the sheet material, which pleats act as a carrier for the separate strips that take up a substantial part of the space between the pleats of the sheet material in which they are located and which extend along substantially the whole length of a pleat to space adjacent pleats from each other.
Claim 2
Dependent Claim
109 words
A filtering device for connection to the respiratory tract of a person and comprising a cover enclosing separate strips of a heat and moisture exchanging material and a bacteria absorbing filter which consists of a folded, air-permeable pleated sheet material, the strips of heat and moisture exchanging material being disposed in a plurality of the pleats of the sheet material, which pleats act as a carrier for the separate strips that take up a substantial part of the space between the pleats of the sheet material in which they are located and which extend along substantially the whole length of a pleat to space adjacent pleats from each other.
Claim 3
Dependent Claim
19 words
A filtering device according to claim 1, wherein the strips are disposed on both sides of the sheet material.
Claim 4
Dependent Claim
31 words
A filtering device according to claim 1, wherein the sheet material is folded into a staggered shape and is given one of a fan-like, circular shape and a generally rectangular shape.
Claim 5
Dependent Claim
23 words
A filtering device according to claim 1, wherein the cross-sectional shape of the strips is essentially the same as that of the pleats.
Claim 6
Dependent Claim
43 words
A filtering device according to claim 1, wherein the strips are folded or waved and consist of a material with little or no air permeability and that large parts of the folded surfaces of the strips are spaced apart from the sheet material.
Claim 7
Dependent Claim
32 words
A filtering device according to claim 1, wherein the sheet material consists of one of the following materials: cellulose paper, hydrophobized glass fibres, polysulphone, electrically charged polypropylene fibres and thin polycarbonate fibres.
Claim 8
Dependent Claim
37 words
A filtering device according to claim 1, wherein the strips consist of an air-permeable material, such as foamed polyurethane, loosely packed polyethylene or polyester fibres, or folded paper, which material is preferably treated with a hydrophilic substance.
Claim 9
Dependent Claim
18 words
A filtering device according to claim 7, wherein the air permeable material is treated with a hydrophilic substance.
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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) | 1997-06-13 | 1997-12-13 | 1998-06-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-06-13 | 2001-12-13 | 2002-06-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-06-13 | 2005-12-13 | 2006-06-14 | $7700.00 | Window Closed / Lapsed |