US5175046A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Superabsorbent laminate structure
Assignee: JPMorgan Chase Bank NA
•
Filing: 1991-03-04
•
Granted: 1992-12-29
•
Expires: 2011-03-04
Abstract
Abstract A laminated structure in which a superabsorbent material is provided as a layer of discrete discontinuous chunks or elements attached to a continuous porous support layer. The superabsorbent element is provided by saturating a porous substrate with an acrylic acid monomer solution, polymerizing and crosslinking the monomer in the web, and then dicing the monomer/web substrate to produce discrete superabsorbent elements. The superabsorbent elements having various shaped are then affixed to the flexible porous support layer by friction so as to provide the flexible superabsorbent laminated structure.
Inventors
- 👤 Hien V. Nguyen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 14:25
CPC Classifications
A; A61; A61F; A61F13/00; A61F13/15; A61F13/53; A61F13/534; A61F13/535; A61F13/537; A61F13/539; A61L; A61L15/00; A61L15/16; A61L15/42; A61L15/60; A61F2013/00361; A61F2013/00655; A61F2013/00676; A61F2013/0068; A61F13/15203; A61F2013/15284; A61F2013/15422; A61F2013/530131; A61F2013/530226; A61F2013/530299; A61F2013/530306; A61F2013/530481; A61F2013/530583; A61F2013/530613; A61F2013/53062; A61F2013/530635; A61F2013/530642; A61F2013/530649; A61F2013/530656; A61F2013/5307; A61F2013/530708; A61F2013/530737; A61F2013/530766; A61F2013/530802; Y; Y10; Y10T; Y10T428/00; Y10T428/23; Y10T428/237; Y10T428/24; Y10T428/24802; Y10T428/24826; Y10T428/249921; Y10T428/249953; Y10T428/249986; Y10T428/25; Y10T428/254
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
33 words
A laminated structure comprising a porous support layer and discrete superabsorbent elements frictionally secured to said support layer in a discontinuous pattern, said superabsorbent elements comprising a superabsorbent polymer and a substrate material.
Claim 2
Dependent Claim
33 words
A laminated structure comprising a porous support layer and discrete superabsorbent elements frictionally secured to said support layer in a discontinuous pattern, said superabsorbent elements comprising a superabsorbent polymer and a substrate material.
Claim 3
Dependent Claim
32 words
The laminated structure of claim 1 further comprising a porous cover layer, said cover layer being placed so that said superabsorbent elements are located between said support layer and said cover layer.
Claim 4
Dependent Claim
15 words
The laminated structure of claim 1 wherein said support layer is a layer of tissue.
Claim 5
Dependent Claim
14 words
The laminated structure of claim 1 wherein said support layer is a fibrous web.
Claim 6
Dependent Claim
14 words
The laminated structure of claim 1 wherein said support layer is an open-cell foam.
Claim 7
Dependent Claim
14 words
The laminated structure of claim 1 wherein said substrate material is a fibrous web.
Claim 8
Dependent Claim
14 words
The laminated structure of claim 1 wherein said substrate material is an open-cell foam.
Claim 9
Dependent Claim
14 words
The laminated structure of claim 1 wherein said substrate material is a tissue web.
Claim 10
Dependent Claim
23 words
The laminated structure of claim 1 wherein said superabsorbent elements cover from 5% to 75% of the surface area of said supporting layer.
Claim 11
Dependent Claim
28 words
The laminated structure of claim 1 wherein said superabsorbent polymer is water insoluble, water swellable, and capable of absorbing at least ten times its own weight of water.
Claim 12
Dependent Claim
21 words
The laminated structure of claim 1 wherein said superabsorbent elements have a size of about 1 mm to about 1 cm.
Claim 13
Dependent Claim
28 words
The laminated structure of claim 1 wherein said superabsorbent elements consist of polymerized monomer coated substrate having a polymer add-on level of at least about 100 wt %.
References Cited (Backward Citations)
US4381782A
Cited
US4578068A
Cited
US4851069A
Cited
US4994053A
Cited
US4699823A
Cited
US4888231A
Cited
US4758466A
Cited
US5041104A
Cited
US4902565A
Cited
US4861652A
Cited
US5128193A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1995-12-29 | 1996-06-29 | 1996-12-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-12-29 | 2000-06-29 | 2000-12-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-12-29 | 2004-06-29 | 2004-12-29 | $7700.00 | Window Closed / Lapsed |