US4559050A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thin, soft, absorbent product
Assignee: Personal Products Co
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Filing: 1984-08-17
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Granted: 1985-12-17
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Expires: 2004-08-17
Abstract
Abstract An absorbent structure is provided, which is comprised of a fibrous web, having an initial dry bulk of at least about 20 cc/gm., a dry bulk recovery of at least about 30 percent, and a wet bulk of at least about 30 cc/gm., and a basis weight less than about 4 oz/sq. yd. containing at least about 200 percent by weight superabsorbent. The structure is microcorrugated to provide a softness having a Taber stiffness value less than about 50.
Inventors
- 👤 Michael J. Iskra
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:14
CPC Classifications
A; A61; A61F; A61F13/00; A61F13/15; A61F13/53; A61F13/534; A61F13/535; A61F13/536; A61F13/15203; A61F13/51; A61F13/511; A61F13/51104; A61F13/51121; A61F13/531; A61F13/532; A61F13/533; A61F13/537; A61F13/539; A61F2013/530131; A61F2013/530481; A61F2013/530489; A61F2013/530496; A61F2013/530868; A61F2013/530927; A61F2013/530934; A61F2013/530941; A61F2013/53445; A61F13/53708; A61F2013/53721; A61F2013/53966
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
89 words
An absorbent structure comprising a fibrous web of resilient fibers, said web having a basis weight less than about 4 oz/sq. yd., an initial dry bulk of at least about 20 cc/gm., a dry bulk recovery of at least about 30 percent and a wet bulk of at least about 30 cc/gm., and superabsorbent disposed in amongst the fibers of said web in an amount of at least about 200 percent by weight based on said web weight, said structure having a Taber stiffness value less than about 50.
Claim 2
Dependent Claim
89 words
An absorbent structure comprising a fibrous web of resilient fibers, said web having a basis weight less than about 4 oz/sq. yd., an initial dry bulk of at least about 20 cc/gm., a dry bulk recovery of at least about 30 percent and a wet bulk of at least about 30 cc/gm., and superabsorbent disposed in amongst the fibers of said web in an amount of at least about 200 percent by weight based on said web weight, said structure having a Taber stiffness value less than about 50.
Claim 3
Dependent Claim
16 words
The absorbent structure of claim 1 wherein said Taber stiffness value is less than about 25.
Claim 4
Dependent Claim
25 words
The absorbent structure of claim 1 wherein a layer of wood pulp fibers has been placed on at least one side of said absorbent structure.
Claim 5
Dependent Claim
21 words
The product of claim 3 wherein a layer of wood pulp fibers is placed on both sides of said absorbent structure.
Claim 6
Dependent Claim
16 words
The absorbent structure of claim 1 wherein said fibrous web is a web of polyester fibers.
Claim 7
Dependent Claim
81 words
A disposable diaper containing as the absorbing layer an absorbent structure comprising a fibrous web, said we having of at least about 20 cc/gm., a dry bulk recovery of at least about 30 percent, and a wet bulk of at least about 30 cc/gm., and superabsorbent disposed in amongst the fibers of said web in an amount of at least about 200 percent by weight based on said web weight, said structure having a Taber stiffness value less than about 50.
Claim 8
Dependent Claim
81 words
A disposable diaper containing as the absorbing layer an absorbent structure comprising a fibrous web, said we having of at least about 20 cc/gm., a dry bulk recovery of at least about 30 percent, and a wet bulk of at least about 30 cc/gm., and superabsorbent disposed in amongst the fibers of said web in an amount of at least about 200 percent by weight based on said web weight, said structure having a Taber stiffness value less than about 50.
Claim 9
Dependent Claim
90 words
A sanitary napkin having as the absorbent layer an absorbent structure comprising a fibrous web having a basis weight less than about 4 oz/sq. yd., an initial dry bulk of at least about 20 cc/gm., a dry bulk recovery of at least 30 percent, and a wet bulk of at least about 30 cc/gm., and superabsorbent disposed in amongst the fibers of said web in an amount at least about 200 percent by weight based on said web weight, said structure having a Taber stiffness value less than about 50.
Claim 10
Dependent Claim
90 words
A sanitary napkin having as the absorbent layer an absorbent structure comprising a fibrous web having a basis weight less than about 4 oz/sq. yd., an initial dry bulk of at least about 20 cc/gm., a dry bulk recovery of at least 30 percent, and a wet bulk of at least about 30 cc/gm., and superabsorbent disposed in amongst the fibers of said web in an amount at least about 200 percent by weight based on said web weight, said structure having a Taber stiffness value less than about 50.
Claim 11
Independent Claim
106 words
A method for preparing an absorbent structure being capable of absorbing at least about 5 cc/gm. of liquid and being a nonwoven web having a basis weight of less than about 4 oz/sq. yd., an initial dry bulk of at least about 20 cc/gm., a dry bulk recovery of at least about 30 percent, and a wet bulk of at least about 30 cc/gm., said web containing at least about 200 percent by weight superabsorbent comprising: (a) drying said web containing superabsorbent to a moisture content less than about 25 percent, and (b) microcorrugating said web to provide a Taber stiffness of less than about 50.
Claim 12
Independent Claim
106 words
A method for preparing an absorbent structure being capable of absorbing at least about 5 cc/gm. of liquid and being a nonwoven web having a basis weight of less than about 4 oz/sq. yd., an initial dry bulk of at least about 20 cc/gm., a dry bulk recovery of at least about 30 percent, and a wet bulk of at least about 30 cc/gm., said web containing at least about 200 percent by weight superabsorbent comprising: (a) drying said web containing superabsorbent to a moisture content less than about 25 percent, and (b) microcorrugating said web to provide a Taber stiffness of less than about 50.
Claim 13
Dependent Claim
15 words
The method of claim 8 wherein said Taber stiffness value is less than about 25.
Claim 14
Dependent Claim
20 words
The method of claim 8 wherein said Taber stiffness value is less than about 10 in at least one direction.
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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) | 1988-12-16 | 1989-06-17 | 1989-12-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-12-16 | 1993-06-17 | 1993-12-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-12-16 | 1997-06-17 | 1997-12-17 | $7700.00 | Window Closed / Lapsed |