US4144886A
Expired / Lapsed
US
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Absorbent laminate
Assignee: Hoechst AG
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Filing: 1976-10-26
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Granted: 1979-03-20
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Expires: 1996-10-26
Abstract
Abstract An absorbent laminate comprising a first layer of absorbent material and at least one layer comprising a tissue having an absorbent carbohydrate derivative on at least one face.
Inventors
- 👤 Arno Holst
- 👤 Helmut Lask
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 01:10
CPC Classifications
A; A61; A61F; A61F13/00; A61F13/15; A61F13/51; A61F13/511; A61F13/513; A61L; A61L15/00; A61L15/16; A61L15/22; A61L15/28; A61L15/42; A61L15/60; A61F13/20; A61F13/2002; A61F13/202; A61F13/53; A61F13/534; A61F13/514; A61F13/51401; A61F2013/51409; A61F2013/530481; A61F2013/53445; Y; Y10; Y10T; Y10T428/00; Y10T428/249921; Y10T428/249953; Y10T428/249962; Y10T428/249964; Y10T428/249965; Y10T428/31504; Y10T428/31971; Y10T428/31975; Y10T428/31978; Y10T428/31986
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
76 words
In an absorbent laminate comprising a first layer of cellulose flock, at least one layer of a tissue having an absorbent carbohydrate derivative on at least one face and a covering fleece, the tissue layer being positioned between the fleece and the first layer, the improvement comprising that the absorbent carbohydrate derivative is selected from the group consisting of a crosslinked cellulose ether, a cross-linked starch ether, and a starch grafted with acrylonitrile and subsequently saponified.
Claim 2
Dependent Claim
76 words
In an absorbent laminate comprising a first layer of cellulose flock, at least one layer of a tissue having an absorbent carbohydrate derivative on at least one face and a covering fleece, the tissue layer being positioned between the fleece and the first layer, the improvement comprising that the absorbent carbohydrate derivative is selected from the group consisting of a crosslinked cellulose ether, a cross-linked starch ether, and a starch grafted with acrylonitrile and subsequently saponified.
Claim 3
Dependent Claim
16 words
A laminate as claimed in claim 1, wherein the carbohydrate derivative is a crosslinked cellulose ether.
Claim 4
Dependent Claim
15 words
A laminate as claimed in claim 1, wherein the carbohydrate derivative is cross-linked carboxymethyl cellulose.
Claim 5
Dependent Claim
29 words
A laminate as claimed in claim 1, wherein the tissue layer is coated with carbohydrate derivative on one face only and the coated face is towards the first layer.
Claim 6
Dependent Claim
21 words
A laminate as claimed in claim 1, wherein the tissue covers a part only of any surface of the first layer.
Claim 7
Dependent Claim
16 words
A laminate as claimed in claim 1, having tissue on both sides of the first layer.
Claim 8
Dependent Claim
19 words
A laminate as claimed in claim 1, wherein the tissue is on one side only of the first layer.
Claim 9
Dependent Claim
28 words
A laminate as claimed in claim 1, which also comprises an uncoated tissue layer between said covering fleece and said tissue layer having an absorbent carbohydrate derivative thereon.
Claim 10
Dependent Claim
23 words
A laminate as claimed in claim 1, which comprises a film, substantially impervious to moisture, positioned as one outer face of the laminate.
Claim 11
Dependent Claim
19 words
A laminate as claimed in claim 1, in the form of a diaper, diaper pants, or a bed sheet.
Claim 12
Dependent Claim
59 words
An absorbent laminate comprising a first layer of cellulose flock having on at least one face a tissue layer coated with an absorbent carbohydrate derivative selected from the group consisting of a crosslinked cellulose ether, a cross-linked starch ether and a starch grafted with acrylonitrile and subsequently saponified, an uncoated tissue, and a covering fleece, in the order stated.
Claim 13
Dependent Claim
59 words
An absorbent laminate comprising a first layer of cellulose flock having on at least one face a tissue layer coated with an absorbent carbohydrate derivative selected from the group consisting of a crosslinked cellulose ether, a cross-linked starch ether and a starch grafted with acrylonitrile and subsequently saponified, an uncoated tissue, and a covering fleece, in the order stated.
Claim 14
Dependent Claim
68 words
An absorbent laminate comprising a first layer of cellulose flock having on one face, in succession, a tissue layer coated with an absorbent carbohydrate derivative selected from the group consisting of a crosslinked cellulose ether, a cross-linked starch ether and a starch grafted with acrylonitrile and subsequently saponified, an uncoated tissue and a covering fleece, and having on the other face an uncoated tissue and an impervious film.
Claim 15
Dependent Claim
68 words
An absorbent laminate comprising a first layer of cellulose flock having on one face, in succession, a tissue layer coated with an absorbent carbohydrate derivative selected from the group consisting of a crosslinked cellulose ether, a cross-linked starch ether and a starch grafted with acrylonitrile and subsequently saponified, an uncoated tissue and a covering fleece, and having on the other face an uncoated tissue and an impervious film.
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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) | 1982-03-19 | 1982-09-18 | 1983-03-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-03-19 | 1986-09-18 | 1987-03-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-03-19 | 1990-09-18 | 1991-03-20 | $7700.00 | Window Closed / Lapsed |