Patent US4737022A successfully refreshed from Google Patents.
Patent US4804378A successfully refreshed from Google Patents.
US4804378A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Absorbent article
Assignee: Kao Corp
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Filing: 1987-04-24
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Granted: 1989-02-14
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Expires: 2007-04-24
Abstract
Abstract An absorbing article comprises a surface layer to be in contact with skins containing from 60 to 100% by weight of first fibers having a hydrophilic surface and a hydrophobic inside and from 40 to 0% by weight of second fibers which are hydrophilic at least at their surface, and a rearface constituted at least with one or more layers containing from 0 to 50% by weight of said first fibers and from 100 to 50% by weight of said second fibers, in which the surface hydrophilic property, after being wetted, is higher in said second fibers than in said first fibers.
Inventors
- 👤 Daisuke Shiba
- 👤 Akira Sakurai
- 👤 Iwao Miyashita
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 10:40
CPC Classifications
A; A61; A61F; A61F13/00; A61F13/15; A61F13/51; A61F13/511; A61F13/513; A61F13/51305; A61F13/51121; A61F2013/51002; A61F2013/51038; A61F2013/51042; A61F13/514; A61F13/51401; A61F2013/51409; A61F13/53; A61F2013/530131; A61F2013/53016; A61F2013/530481
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
105 words
An absorbent article which comprises as the surface material a nonwoven fabric comprising (1) a surface layer comprising 60 to 100 percent by weight of first fibers having a hydrophilic surface portion and a hydrophobic inside portion and from 40 to zero percent by weight of the second fibers being hydrophilic at least on the surface thereof and (2) at least one back layer comprising from zero to 50 percent by weight of said first fibers and from 100 to 50 percent by weight of said second fibers, said second fibers having a larger surface hydrophilic property than said first fibers after having been wetted.
Claim 2
Dependent Claim
105 words
An absorbent article which comprises as the surface material a nonwoven fabric comprising (1) a surface layer comprising 60 to 100 percent by weight of first fibers having a hydrophilic surface portion and a hydrophobic inside portion and from 40 to zero percent by weight of the second fibers being hydrophilic at least on the surface thereof and (2) at least one back layer comprising from zero to 50 percent by weight of said first fibers and from 100 to 50 percent by weight of said second fibers, said second fibers having a larger surface hydrophilic property than said first fibers after having been wetted.
Claim 3
Dependent Claim
18 words
An absorbent article as claimed in claim 1, in which the surface layer consists of the first fibers.
Claim 4
Dependent Claim
45 words
An absorbent articles as claimed in claim 1, in which said first fibers have been formed by making hydrophobic fibers hydrophilic on the surface thereof and the second fibers are hydrophilic fibers or have been formed by making hydrophobic fibers hydrophilic on the surface thereof.
Claim 5
Dependent Claim
44 words
An absorbent articles as claimed in claim 1, in which the first fibers of the surface layer, wetted, has a surface hydrophilic property of 0.5 ml or smaller and the second fibers of the back layer, wetted, has that of 1 to 2 ml.
Claim 6
Dependent Claim
19 words
An absorbent article as claimed in claim 1, which comprises said nonwoven fabric, an absorbent and a leak-proof material.
Claim 7
Dependent Claim
17 words
An absorbent article as claimed in claim 1, which is a sanitary napkin or a disposable diaper.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-02-14 | 1992-08-15 | 1993-02-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-02-14 | 1996-08-15 | 1997-02-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-02-14 | 2000-08-15 | 2001-02-14 | $7700.00 | Window Closed / Lapsed |