US4902544A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Leak resistant absorbent product
Assignee: Sheen Kleen Inc
•
Filing: 1988-05-24
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Granted: 1990-02-20
•
Expires: 2008-05-24
Abstract
Abstract Leak resistant absorbent articles are made from a tubular casing of liquid permeable fabric wherein the casing is loosely filled with a mixture of particles of a crosslinked hydrocolloid and particles of other liquid absorbing material.
Inventors
- 👤 Dai W. Kim
- 👤 Albert R. Cowling
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 06:39
CPC Classifications
A; A47; A47L; A47L13/00; A47L13/10; A47L13/16; Y; Y10; Y10T; Y10T428/00; Y10T428/13; Y10T428/1352; Y10T428/1362
Claims Analysis
Total Claims: 28
Claim 1
Independent Claim
58 words
An article for use in absorbing fluids which comprises a flexible tubular casing of liquid permeable fabric sealed at each end and containing therein discrete particles of a crosslinked hydrocolloid insoluble in water but capable of absorbing water in admixture with other particulate matter which is insoluble in water but is capable of absorbing water and organic liquids.
Claim 2
Dependent Claim
58 words
An article for use in absorbing fluids which comprises a flexible tubular casing of liquid permeable fabric sealed at each end and containing therein discrete particles of a crosslinked hydrocolloid insoluble in water but capable of absorbing water in admixture with other particulate matter which is insoluble in water but is capable of absorbing water and organic liquids.
Claim 3
Dependent Claim
17 words
The article of claim 1 wherein the fabric of the tubular casing is made from nylon fibers.
Claim 4
Dependent Claim
13 words
The article of claim 2 wherein the fabric is knitted from textured nylon.
Claim 5
Dependent Claim
38 words
The article of claim 1 wherein the hydrocolloid and the other particulate matter are present in the amount of about 5 to about 50 weight percent hydrocolloid and about 95 to about 50 weight percent other particulate matter.
Claim 6
Dependent Claim
23 words
The article of claim 1 wherein the hydrocolloid is polymer of water soluble acrylic or vinyl monomers slightly crosslinked with a polyfunctional reactant.
Claim 7
Dependent Claim
22 words
The article of claim 5 wherein the hydrocolloid is a graft copolymer of acrylic acid and starch crosslinked with a diunsaturated monomer.
Claim 8
Dependent Claim
13 words
The article of claim 1 wherein the other particulate matter is crushed corncobs.
Claim 9
Dependent Claim
13 words
The article of claim 1 wherein the other particulate matter is silica gel.
Claim 10
Dependent Claim
14 words
The article of claim 1 wherein the other particulate matter is a clay mineral.
Claim 11
Dependent Claim
15 words
The article of claim 9 wherein the clay mineral is a mixture of metal oxides.
Claim 12
Dependent Claim
11 words
The article of claim 10 wherein the metal oxides are amorphous.
Claim 13
Dependent Claim
15 words
The article of claim 1 wherein the other particulate matter is a cellular organic polymer.
Claim 14
Dependent Claim
14 words
The article of claim 12 wherein the cellular organic polymer is melt blown polypropylene.
Claim 15
Dependent Claim
69 words
A process for controlling liquid spills which comprises placing in contact with the spill an article which is comprised of a flexible tubular casing of liquid permeable fabric sealed at each end and containing therein discrete particles of a crosslinked hydrocolloid insoluble in water but capable of absorbing water in admixture with other particulate matter which is insoluble in water but is capable of absorbing water and organic liquids.
Claim 16
Dependent Claim
69 words
A process for controlling liquid spills which comprises placing in contact with the spill an article which is comprised of a flexible tubular casing of liquid permeable fabric sealed at each end and containing therein discrete particles of a crosslinked hydrocolloid insoluble in water but capable of absorbing water in admixture with other particulate matter which is insoluble in water but is capable of absorbing water and organic liquids.
Claim 17
Dependent Claim
35 words
The process of claim 14 wherein the article is placed in the path of the liquid spill and absorbs the spill as well as acting as a dam to prevent further spreading of the spill.
Claim 18
Dependent Claim
15 words
The process of claim 14 wherein the tubular casing is made from knitted textured nylon.
Claim 19
Dependent Claim
38 words
The process of claim 14 wherein the hydrocolloid and the other particulate matter are present in the amount of about 5 to about 50 weight percent hydrocolloid and about 95 to about 50 weight percent other particulate matter.
Claim 20
Dependent Claim
24 words
The process of claim 14 wherein the hydrocolloid is a polymer of water soluble acrylic or vinyl monomers slightly crosslinked with a polyfunctional reactant.
Claim 21
Dependent Claim
22 words
The process of claim 18 wherein the hydrocolloid is a graft copolymer of acrylic acid and starch crosslinked with a diunsaturated monomer.
Claim 22
Dependent Claim
13 words
The process of claim 14 wherein the other particulate matter is crushed corncobs.
Claim 23
Dependent Claim
13 words
The process of claim 14 wherein the other particulate matter is silica gel.
Claim 24
Dependent Claim
14 words
The process of claim 14 wherein the other particulate matter is a clay mineral.
Claim 25
Dependent Claim
15 words
The process of claim 22 wherein the clay mineral is a mixture of metal oxides.
Claim 26
Dependent Claim
11 words
The process of claim 23 wherein the metal oxides are amorphous.
Claim 27
Dependent Claim
15 words
The process of claim 14 wherein the other particulate matter is a cellular organic polymer.
Claim 28
Dependent Claim
14 words
The process of claim 25 wherein the cellular organic polymer is melt blown polypropylene.
References Cited (Backward Citations)
US4737394A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-02-19 | 1993-08-21 | 1994-02-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-02-19 | 1997-08-21 | 1998-02-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-02-19 | 2001-08-21 | 2002-02-20 | $7700.00 | Window Closed / Lapsed |