US4600002A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Disposable respirator
Assignee: Cabot Safety Intermediate LLC
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Filing: 1984-10-24
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Granted: 1986-07-15
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Expires: 2004-10-24
Abstract
Abstract A multiple ply, fold-flat, disposable respirator having, as one ply, a layer of a toxic gas or vapor absorbing material. Another ply is an aerosol filter. The respirator has an inturned vertical seam covered with a strip of foamed elastomer.
Inventors
- 👤 Richard D. Maryyanek
- 👤 Joseph Z. Zdrok
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 10:19
CPC Classifications
A; A41; A41D; A41D13/00; A41D13/05; A41D13/11; A41D13/1107; A41D13/1138; A41D13/1146; A62; A62B; A62B23/00; A62B23/02; A62B23/025
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
105 words
A fold-flat, disposable respirator comprising: a pair of multiple layered webs of flexible air-permeable materials, each web comprising a layer of an aerosol filtering material and a layer of a toxic gas absorbing material, said webs each having one curvilinear edge portion for mating with facial contours and said webs being joined together at a common seam which is vertical as worn, the web edges forming said vertical seam being located on the interior of said respirator and being covered with a strip of an elastomeric foam coextensive with the length of said seam; and means for holding said respirator open against a wearer's face.
Claim 2
Dependent Claim
105 words
A fold-flat, disposable respirator comprising: a pair of multiple layered webs of flexible air-permeable materials, each web comprising a layer of an aerosol filtering material and a layer of a toxic gas absorbing material, said webs each having one curvilinear edge portion for mating with facial contours and said webs being joined together at a common seam which is vertical as worn, the web edges forming said vertical seam being located on the interior of said respirator and being covered with a strip of an elastomeric foam coextensive with the length of said seam; and means for holding said respirator open against a wearer's face.
Claim 3
Dependent Claim
22 words
The respirator of claim 1 wherein said filtering material layer and said absorbing material layer both comprise a lofty, fibrous, non-woven fabric.
Claim 4
Dependent Claim
47 words
The respirator of claim 1 wherein each of said webs comprises: an inner, soft fabric liner for contact with the face; an intermediate layer of a fibrous batt impregnated with a solid, particulate absorbent for toxic gas; an outer covering layer serving to protect said intermediate layers.
Claim 5
Dependent Claim
33 words
The respirator of claim 1 further comprising a strip of deformable material spanning said vertical seam, which strip may be bent to conform to the shape of the bridge of the wearer's nose.
Claim 6
Dependent Claim
15 words
The respirator of claim 4 wherein said strip is in the configuration of a chevron.
Claim 7
Dependent Claim
13 words
The respirator of claim 4 wherein said strip is a ductile metallic material.
Claim 8
Dependent Claim
21 words
The respirator of claim 1 wherein said toxic gas absorbing material is on the exterior side of said aerosol filtering material.
References Cited (Backward Citations)
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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) | 1989-07-14 | 1990-01-13 | 1990-07-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-07-14 | 1994-01-13 | 1994-07-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-07-14 | 1998-01-13 | 1998-07-15 | $7700.00 | Window Closed / Lapsed |