US4413996A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Diaper with liquid retaining chamber
Assignee: Individual
•
Filing: 1981-07-14
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Granted: 1983-11-08
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Expires: 2001-07-14
Abstract
Abstract A diaper for use upon an infant, comprising a sealed chamber for retaining excess liquids, formed between two moisture impervious sheets spaced apart by absorbent wadding, the innermost sheet having an opening therethrough for entry of the liquids into the reservoir. The diaper may further comprise a layer of conventional diaper wadding on the inside face of the innermost impervious sheet. The liquid capacity of the chamber is substantially greater than that of conventional wadding alone, so that diaper changes are needed less frequently. The infant is substantially protected from wetness by the barrier sheet.
Inventors
- 👤 Kevin D. Taylor
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 21:29
CPC Classifications
A; A61; A61F; A61F13/00; A61F13/15; A61F13/45; A61F13/49; A61F13/494; A61F13/49473; A61F13/53; A61F13/534; A61F13/535; A61F13/537; A61F13/53708; A61F2013/53721; A61F2013/53726; A61F2013/53765
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
161 words
A diaper comprising: a thin flexible, moisture impervious backing sheet; a layer of porous fibrous material superimposed upon the backing sheet; a thin flexible moisture impervious barrier sheet generally covering the fibrous layer and sealably secured around its periphery to the backing sheet, said barrier sheet having a port therethrough positioned to allow entry of liquid from the body of the infant into the fibrous layer, the layer of fibrous material being dished toward the backing sheet at the port through the barrier sheet, so as to form a well for receiving the liquid; a thin flexible, water pervious well lining sheet covering the side and bottom portions of the well; and a well surrounding layer of porous fibrous material interposed between the well lining sheet and the adjacent porous fibrous material of the layer, said well surrounding layer being substantially more porous than the material upon the backing sheet, so that the liquid entering the well is immediately collected thereby.
Claim 2
Dependent Claim
161 words
A diaper comprising: a thin flexible, moisture impervious backing sheet; a layer of porous fibrous material superimposed upon the backing sheet; a thin flexible moisture impervious barrier sheet generally covering the fibrous layer and sealably secured around its periphery to the backing sheet, said barrier sheet having a port therethrough positioned to allow entry of liquid from the body of the infant into the fibrous layer, the layer of fibrous material being dished toward the backing sheet at the port through the barrier sheet, so as to form a well for receiving the liquid; a thin flexible, water pervious well lining sheet covering the side and bottom portions of the well; and a well surrounding layer of porous fibrous material interposed between the well lining sheet and the adjacent porous fibrous material of the layer, said well surrounding layer being substantially more porous than the material upon the backing sheet, so that the liquid entering the well is immediately collected thereby.
Claim 3
Dependent Claim
218 words
A diaper comprising: a thin flexible, moisture impervious backing sheet; a layer of porous fibrous material superimposed upon the backing sheet; a thin flexible moisture impervious barrier sheet generally covering the fibrous layer and sealably secured around its periphery to the backing sheet, said barrier sheet having a port therethrough positioned to allow entry of liquid from the body of the infant into the fibrous layer, the layer of fibrous material being dished toward the backing sheet at the port through the barrier sheet, so as to form a well for receiving the liquid; a thin flexible, water pervious well lining sheet covering the side and bottom portions of the well; an inside layer of moisture absorbent material superimposed upon the barrier sheet, having an opening therethrough in general matching relationship to the port through the barrier sheet; a thin flexible, water pervious inside lining sheet superimposed upon the inside absorbent layer, having an opening therethrough in general matching relationship to the opening of the inside absorbent layer; and a well surrounding layer of porous fibrous material interposed between the well lining sheet and the adjacent porous fibrous material of the layer, said well surrounding layer being substantially more porous than the material upon the backing sheet, so that the liquid entering the well is immediately collected thereby.
Claim 4
Dependent Claim
218 words
A diaper comprising: a thin flexible, moisture impervious backing sheet; a layer of porous fibrous material superimposed upon the backing sheet; a thin flexible moisture impervious barrier sheet generally covering the fibrous layer and sealably secured around its periphery to the backing sheet, said barrier sheet having a port therethrough positioned to allow entry of liquid from the body of the infant into the fibrous layer, the layer of fibrous material being dished toward the backing sheet at the port through the barrier sheet, so as to form a well for receiving the liquid; a thin flexible, water pervious well lining sheet covering the side and bottom portions of the well; an inside layer of moisture absorbent material superimposed upon the barrier sheet, having an opening therethrough in general matching relationship to the port through the barrier sheet; a thin flexible, water pervious inside lining sheet superimposed upon the inside absorbent layer, having an opening therethrough in general matching relationship to the opening of the inside absorbent layer; and a well surrounding layer of porous fibrous material interposed between the well lining sheet and the adjacent porous fibrous material of the layer, said well surrounding layer being substantially more porous than the material upon the backing sheet, so that the liquid entering the well is immediately collected thereby.
Claim 5
Dependent Claim
161 words
A diaper comprising: a thin flexible, moisture impervious backing sheet; a layer of porous fibrous material superimposed upon the backing sheet; a thin flexible moisture impervious barrier sheet generally covering the fibrous layer and sealably secured around its periphery to the backing sheet, said barrier sheet having a port therethrough positioned to allow entry of liquid from the body of the infant into the fibrous layer, the layer of fibrous material being dished toward the backing sheet at the port through the barrier sheet, so as to form a well for receiving the liquid; an inside layer of moisture absorbent material superimposed upon the barrier sheet, having an opening therethrough in general matching relationship to the part through the barrier sheet; a pad of fibrous material substantially filling the liquid receiving well, being substantially more porous than the material upon the backing sheet; and a thin flexible, water pervious inside lining sheet superimposed upon the inside absorbent layer and the pad.
Claim 6
Dependent Claim
161 words
A diaper comprising: a thin flexible, moisture impervious backing sheet; a layer of porous fibrous material superimposed upon the backing sheet; a thin flexible moisture impervious barrier sheet generally covering the fibrous layer and sealably secured around its periphery to the backing sheet, said barrier sheet having a port therethrough positioned to allow entry of liquid from the body of the infant into the fibrous layer, the layer of fibrous material being dished toward the backing sheet at the port through the barrier sheet, so as to form a well for receiving the liquid; an inside layer of moisture absorbent material superimposed upon the barrier sheet, having an opening therethrough in general matching relationship to the part through the barrier sheet; a pad of fibrous material substantially filling the liquid receiving well, being substantially more porous than the material upon the backing sheet; and a thin flexible, water pervious inside lining sheet superimposed upon the inside absorbent layer and the pad.
Claim 7
Dependent Claim
218 words
A diaper comprising: a thin flexible, moisture impervious backing sheet; a layer of porous fibrous material superimposed upon the backing sheet; a thin flexible moisture impervious barrier sheet generally covering the fibrous layer and sealably secured around its periphery to the backing sheet, said barrier sheet having a port therethrough positioned to allow entry of liquid from the body of the infant into the fibrous layer, the layer of fibrous material being dished toward the backing sheet at the port through the barrier sheet, so as to form a well for receiving the liquid; a thin flexible, water pervious well lining sheet covering the side and bottom portions of the well; an inside layer of moisture absorbent material superimposed upon the barrier sheet, having an opening therethrough in general matching relationship to the port through the barrier sheet; a thin flexible, water pervious inside lining sheet superimposed upon the inside absorbent layer, having an opening therethrough in general matching relationship to the opening of the inside absorbent layer; and a well surrounding layer of porous fibrous material interposed between the well lining sheet and the adjacent porous fibrous material of the layer, said well surrounding layer being substantially more porous than the material upon the backing sheet, so that the liquid entering the well is immediately collected thereby.
Claim 8
Dependent Claim
218 words
A diaper comprising: a thin flexible, moisture impervious backing sheet; a layer of porous fibrous material superimposed upon the backing sheet; a thin flexible moisture impervious barrier sheet generally covering the fibrous layer and sealably secured around its periphery to the backing sheet, said barrier sheet having a port therethrough positioned to allow entry of liquid from the body of the infant into the fibrous layer, the layer of fibrous material being dished toward the backing sheet at the port through the barrier sheet, so as to form a well for receiving the liquid; a thin flexible, water pervious well lining sheet covering the side and bottom portions of the well; an inside layer of moisture absorbent material superimposed upon the barrier sheet, having an opening therethrough in general matching relationship to the port through the barrier sheet; a thin flexible, water pervious inside lining sheet superimposed upon the inside absorbent layer, having an opening therethrough in general matching relationship to the opening of the inside absorbent layer; and a well surrounding layer of porous fibrous material interposed between the well lining sheet and the adjacent porous fibrous material of the layer, said well surrounding layer being substantially more porous than the material upon the backing sheet, so that the liquid entering the well is immediately collected thereby.
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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) | 1986-11-07 | 1987-05-09 | 1987-11-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-11-07 | 1991-05-09 | 1991-11-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-11-07 | 1995-05-09 | 1995-11-08 | $7700.00 | Window Closed / Lapsed |