Patent US4885204A successfully refreshed from Google Patents.
US4885204A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Absorbent product with hydrophobic acquisition layer
Assignee: Hercules LLC
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Filing: 1988-08-31
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Granted: 1989-12-05
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Expires: 2008-08-31
Abstract
Abstract Disclosed is a laminated structure for use in an absorbent product comprising a hydrophobic acquisition layer adjacent to a fluid permeable top sheet, and an absorbent layer. The hydrophobic layer comprises a thermally consolidated blend of 5% to 35% of thermally bondable hydrophobic fibers and 65% to 95% wood fluff pulp.
Inventors
- 👤 Peter G. Bither
- 👤 Berne F. Ellers
- 👤 Edward J. Engle, III
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 19:57
CPC Classifications
A; A61; A61F; A61F13/00; A61F13/15; A61F13/53; A61F13/534; A61F13/537; A61F13/53743; A61F13/53747; A41; A41B; A41B13/00; A41B13/04; A61F13/5376; A61L; A61L15/00; A61L15/16; A61L15/22; A61L15/24; A61L15/40; A61F13/15577; A61F2013/15821; A61F2013/15861; A61F2013/15878; A61F13/51; A61F2013/51002; A61F2013/51038; A61F2013/51042; A61F2013/530481; Y; Y10; Y10S; Y10S428/00; Y10S428/913; Y10T; Y10T442/00; Y10T442/60; Y10T442/659; Y10T442/664; Y10T442/668; Y10T442/695; Y10T442/697; Y10T442/698
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
76 words
A laminated structure suitable for use as a component of an absorbant product comprising a hydrophobic acquisition layer adjacent to a fluid permeable top sheet, and an absorbant layer, said hydrophobic layer comprising a thermally consoldated blend of from about 5% to about 35% of a thermally bondable hydrophobic fiber selected from hydrophobic staple fibers and polyolefin pulps, and from about 65% to about 95% of wood fluff pump, based on the weight of the blend.
Claim 2
Dependent Claim
76 words
A laminated structure suitable for use as a component of an absorbant product comprising a hydrophobic acquisition layer adjacent to a fluid permeable top sheet, and an absorbant layer, said hydrophobic layer comprising a thermally consoldated blend of from about 5% to about 35% of a thermally bondable hydrophobic fiber selected from hydrophobic staple fibers and polyolefin pulps, and from about 65% to about 95% of wood fluff pump, based on the weight of the blend.
Claim 3
Dependent Claim
15 words
The structure of claim 1 wherein the hydrophobic fiber is polyethylene pulp or polypropylene pulp.
Claim 4
Dependent Claim
24 words
The structure of claim 2 which also comprises a layer of nonwoven cellulosic tissue positioned between the hydrophobic acquisition layer and the absorbent layer.
Claim 5
Dependent Claim
24 words
The structure of claim 1 which also comprises a layer of nonwoven cellulosic tissue positioned between the hydrophobic acquisition layer and the absorbent layer.
Claim 6
Dependent Claim
16 words
The structure of claim 4 wherein the absorbent layer contains a water-swellable, water-insoluble polymeric absorbent material.
Claim 7
Dependent Claim
16 words
The structure of claim 1 wherein the absorbent layer contains a water-swellable, water-insoluble polymeric absorbent material.
Claim 8
Dependent Claim
32 words
The structure of claim 1 wherein the wood fluff pulp in the hydrophobic acquisition layer is treated with 0.1% to 0.5% ketene dimer, based on the weight of the wood fluff pulp.
Claim 9
Dependent Claim
21 words
The structure of claim 1 wherein the density of the hydrophobic acquisition layer is from about 0.03 to about 0.12 g/cc.
References Cited (Backward Citations)
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US4324247A
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US4338371A
Cited
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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) | 1992-12-04 | 1993-06-05 | 1993-12-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-12-04 | 1997-06-05 | 1997-12-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-12-04 | 2001-06-05 | 2001-12-05 | $7700.00 | Window Closed / Lapsed |