US4920960A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Body fluids barrier mask
Assignee: Kimberly Clark Worldwide Inc
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Filing: 1987-10-02
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Granted: 1990-05-01
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Expires: 2007-10-02
Abstract
Abstract A face mask (10) is provided for covering the mouth and nose of a wearer (14). The mask (10) prevents the passage of liquid from external to the mask to the face of the wearer (14). The mask (10) has four layers including a special low density polyethylene barrier (26). The barrier (26) prevents the passage of liquid in at least one direction while freely allowing the passage of gases in both directions.
Inventors
- 👤 Vance M. Hubbard
- 👤 Welton K. Brunson
- 👤 Darrell S. Caldwell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 10:42
CPC Classifications
B; B01; B01D; B01D39/00; B01D39/14; B01D39/16; B01D39/1607; B01D39/1623; A; A41; A41D; A41D13/00; A41D13/05; A41D13/11; A41D13/1107; A41D13/1115; A41D13/1184; A62; A62B; A62B18/00; A62B18/08; A62B23/00; A62B23/02; A62B23/025; B01D39/18; B01D2239/00; B01D2239/04; B01D2239/0471; B01D2239/06; B01D2239/0604; B01D2239/0622; B01D2239/065; B01D2239/10
Claims Analysis
Total Claims: 29
Claim 1
Independent Claim
104 words
A gas-pervious layered material impervious to liquid in one direction therethrough, comprising: a first layer means of a gas-pervious material having a plurality of apertures therethrough which are impervious to the passage of liquid in the one direction; a second layer means of a nonwicking material fixed to said first layer means to prevent penetration of said apertures by wicking particles which would draw the liquid therethrough; and a third layer means of a filter material to prevent the passage of airborne bacteria, said third layer means applied to said material to place the first layer means between said third and second layers means.
Claim 2
Dependent Claim
104 words
A gas-pervious layered material impervious to liquid in one direction therethrough, comprising: a first layer means of a gas-pervious material having a plurality of apertures therethrough which are impervious to the passage of liquid in the one direction; a second layer means of a nonwicking material fixed to said first layer means to prevent penetration of said apertures by wicking particles which would draw the liquid therethrough; and a third layer means of a filter material to prevent the passage of airborne bacteria, said third layer means applied to said material to place the first layer means between said third and second layers means.
Claim 3
Dependent Claim
32 words
The layered material of claim 1, further comprising a fourth layer means to retard the velocity of liquids impacting said layered material, said fourth layer means applied over said third layer means.
Claim 4
Dependent Claim
15 words
The layered material of claim 1, wherein said material is sufficiently flexible to be folded.
Claim 5
Dependent Claim
16 words
The layered material of claim 3, wherein said material is dimensioned to form a face mask.
Claim 6
Dependent Claim
152 words
An improved face mask for covering a portion of the face of the wearer of the mask which is impervious to body liquids from exterior the mask, comprising: a first layer means of a material for slowing the velocity of a liquid therethrough; a second layer means of a material applied to said first layer means, said second layer means being pervious to gases to allow breathability by the wearer through the mask, and substantially impervious to the passage of body liquids external of the mask for preventing the passage of body liquids through the mask into the portion of the face of the wearer covered by the mask; a third layer means of a nonwoven fabric applied to said second layer means to prevent wicking of liquid through said second layer means to the face of the wearer; and means for removabley attaching the mask to the face of the wearer.
Claim 7
Dependent Claim
152 words
An improved face mask for covering a portion of the face of the wearer of the mask which is impervious to body liquids from exterior the mask, comprising: a first layer means of a material for slowing the velocity of a liquid therethrough; a second layer means of a material applied to said first layer means, said second layer means being pervious to gases to allow breathability by the wearer through the mask, and substantially impervious to the passage of body liquids external of the mask for preventing the passage of body liquids through the mask into the portion of the face of the wearer covered by the mask; a third layer means of a nonwoven fabric applied to said second layer means to prevent wicking of liquid through said second layer means to the face of the wearer; and means for removabley attaching the mask to the face of the wearer.
Claim 8
Dependent Claim
107 words
An improved face mask for covering a portion of the face of the wearer of the mask which is impervious to body liquids from exterior the mask, comprising: a first layer means of a material for slowing the velocity of a liquid therethrough; a second layer means of material applied to said first layer means and comprising a low density polyethylene capable of differentiating between gasses and liquids; a third layer means applied to said second layer means to prevent wicking of liquid through said second layer means to the face of the wearer; and means for removably attaching the mask to the face of the wearer.
Claim 9
Dependent Claim
107 words
An improved face mask for covering a portion of the face of the wearer of the mask which is impervious to body liquids from exterior the mask, comprising: a first layer means of a material for slowing the velocity of a liquid therethrough; a second layer means of material applied to said first layer means and comprising a low density polyethylene capable of differentiating between gasses and liquids; a third layer means applied to said second layer means to prevent wicking of liquid through said second layer means to the face of the wearer; and means for removably attaching the mask to the face of the wearer.
Claim 10
Independent Claim
128 words
A method of preventing the passage of liquids through a face mask through which a wearer breaths, comprising the steps of: affixing a first layer of material to a first side of a second layer of low density polyethylene material being pervious to air but impervious to liquid from outside the mask, said first layer of material retarding the velocity of said liquid impacting the mask; affixing a third layer of nonwicking material to a second side of said second layer such that the penetration of wicking particles from the wearer through said third layer to said second layer is prevented, said step of affixing said third layer comprises fixing a layer of nonwoven fabric; and removably attaching said layers over the nose and mouth of the wearer.
Claim 11
Independent Claim
128 words
A method of preventing the passage of liquids through a face mask through which a wearer breaths, comprising the steps of: affixing a first layer of material to a first side of a second layer of low density polyethylene material being pervious to air but impervious to liquid from outside the mask, said first layer of material retarding the velocity of said liquid impacting the mask; affixing a third layer of nonwicking material to a second side of said second layer such that the penetration of wicking particles from the wearer through said third layer to said second layer is prevented, said step of affixing said third layer comprises fixing a layer of nonwoven fabric; and removably attaching said layers over the nose and mouth of the wearer.
Claim 12
Dependent Claim
78 words
A multi-layered, liquid-impervious face mask for removably covering the mouth and nose of a wearer, comprising: first and second layer means, each comprising a material for retarding the velocity of liquids impacting the exterior of the mask; a third barrier layer means comprising a low density polyethylene to prevent the further passage of said liquids; and a fourth nonwicking layer means comprising a material for contact with the wearer, each of said layer means being pervious to air.
Claim 13
Dependent Claim
78 words
A multi-layered, liquid-impervious face mask for removably covering the mouth and nose of a wearer, comprising: first and second layer means, each comprising a material for retarding the velocity of liquids impacting the exterior of the mask; a third barrier layer means comprising a low density polyethylene to prevent the further passage of said liquids; and a fourth nonwicking layer means comprising a material for contact with the wearer, each of said layer means being pervious to air.
Claim 14
Dependent Claim
24 words
The multilayered face mask of claim 8, wherein said first layer means includes a liquid retarding chemically coated cover stock comprising a nonwoven material.
Claim 15
Dependent Claim
14 words
The multilayered face mask of claim 9, wherein said nonwoven material comprises cellulose fibers.
Claim 16
Dependent Claim
17 words
The multilayered face mask of claim 8, wherein said second layer means further comprises a filtration media.
Claim 17
Dependent Claim
17 words
The multilayered face mask of claim 11, wherein said filtration media comprises a melt blown polypropylene material.
Claim 18
Dependent Claim
17 words
The multilayered face mask of claim 11, wherein said filtration media comprises a melt blown polyester material.
Claim 19
Dependent Claim
40 words
The multilayered face mask of claim 8, wherein said fourth nonwicking layer means of material further comprises a material which is impervious to the passage therethrough of wicking particles from the face of the wearer to said third layer means.
Claim 20
Dependent Claim
17 words
The multilayered face mask of claim 14, wherein said fourth layer means material comprises a nonwoven fabric.
Claim 21
Dependent Claim
180 words
An improved face mask for covering a portion of the face of a wearer which is impervious to body liquids from the exterior of the mask, comprising: a first layer means of a material for slowing the velocity of a liquid therethrough; a second layer means of a material applied to said first layer means, said second layer means being pervious to gases to allow breathability by the wearer through the mask, and substantially impervious to the passage of body liquids external of the mask for preventing passage of body liquids through the mask into contact with the portion of the face of the wearer covered by the mask; a third layer means applied to said second layer means to prevent wicking of liquid through said second layer means to the face of the wearer; a layer means of a filter material between said first layer means and said second layer means to inhibit the passage airborne bacteria and to further slow the velocity of said liquid; and means for removabley attaching the mask to the face of the wearer.
Claim 22
Dependent Claim
180 words
An improved face mask for covering a portion of the face of a wearer which is impervious to body liquids from the exterior of the mask, comprising: a first layer means of a material for slowing the velocity of a liquid therethrough; a second layer means of a material applied to said first layer means, said second layer means being pervious to gases to allow breathability by the wearer through the mask, and substantially impervious to the passage of body liquids external of the mask for preventing passage of body liquids through the mask into contact with the portion of the face of the wearer covered by the mask; a third layer means applied to said second layer means to prevent wicking of liquid through said second layer means to the face of the wearer; a layer means of a filter material between said first layer means and said second layer means to inhibit the passage airborne bacteria and to further slow the velocity of said liquid; and means for removabley attaching the mask to the face of the wearer.
Claim 23
Dependent Claim
13 words
The mask of claim 16, wherein said filter material comprises a meltblown polypropylene.
Claim 24
Dependent Claim
13 words
The mask of claim 16, wherein said filter material comprises a melt-blown polyester.
Claim 25
Dependent Claim
182 words
An improved face mask for covering a portion of the face of a wearer which is impervious to body liquids from the exterior of the mask, comprising: a first layer means of a nonwoven cellulose fiber cover stock for slowing the velocity of a liquid therethrough; a second layer means of material applied to said first layer means, said second layer means being pervious to gases to allow breathability by the wearer through the mask, and substantially impervious to the passage of body liquids external of the mask for preventing passage of body liquids through the mask into contact with the portion of the face of the wearer covered by the mask; a third layer means applied to said second layer means to prevent wicking of liquid through said second layer means to the face of the wearer; a layer means of a filter material between said first layer means and said second layer to inhibit the passage airborne bacteria and to further slow the velocity of said liquid; and means for removabley attaching the mask to the face of the wearer.
Claim 26
Dependent Claim
182 words
An improved face mask for covering a portion of the face of a wearer which is impervious to body liquids from the exterior of the mask, comprising: a first layer means of a nonwoven cellulose fiber cover stock for slowing the velocity of a liquid therethrough; a second layer means of material applied to said first layer means, said second layer means being pervious to gases to allow breathability by the wearer through the mask, and substantially impervious to the passage of body liquids external of the mask for preventing passage of body liquids through the mask into contact with the portion of the face of the wearer covered by the mask; a third layer means applied to said second layer means to prevent wicking of liquid through said second layer means to the face of the wearer; a layer means of a filter material between said first layer means and said second layer to inhibit the passage airborne bacteria and to further slow the velocity of said liquid; and means for removabley attaching the mask to the face of the wearer.
Claim 27
Dependent Claim
22 words
The mask of claim 19, wherein said cover stock further comprises a chemical coating to further slow the velocity of said liquid.
Claim 28
Independent Claim
132 words
A method of preventing the passage of liquids through a face mask through which a wearer breathes, comprising the steps of: affixing a first layer of material to a first side of a second layer of low density polyethylene material pervious to air but impervious to liquid from outside the mask, said first layer of material retarding the velocity of the said impacting the mask; affixing a third layer of nonwicking material to a second side of said second layer such that penetration of wicking particles from the wearer through said third layer to said second layer is prevented; affixing a filter media between said first layer and said second layer to inhibit the passage therethrough of airborne bacteria; and removably attaching said layers over the nose and mouth of the wearer.
Claim 29
Independent Claim
132 words
A method of preventing the passage of liquids through a face mask through which a wearer breathes, comprising the steps of: affixing a first layer of material to a first side of a second layer of low density polyethylene material pervious to air but impervious to liquid from outside the mask, said first layer of material retarding the velocity of the said impacting the mask; affixing a third layer of nonwicking material to a second side of said second layer such that penetration of wicking particles from the wearer through said third layer to said second layer is prevented; affixing a filter media between said first layer and said second layer to inhibit the passage therethrough of airborne bacteria; and removably attaching said layers over the nose and mouth of the wearer.
References Cited (Backward Citations)
US2916037A
Cited
US3603315A
Cited
US3613678A
Cited
US3884227A
Cited
US3989867A
Cited
US3929135A
Cited
US4215682A
Cited
US4419993A
Cited
US4510931A
Cited
US4684570A
Cited
US4662005A
Cited
US4600002A
Cited
US4635628A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-04-30 | 1993-10-30 | 1994-05-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-04-30 | 1997-10-30 | 1998-05-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-04-30 | 2001-10-30 | 2002-05-01 | $7700.00 | Window Closed / Lapsed |