Patent US5350625A successfully refreshed from Google Patents.
US5350625A
Expired / Lapsed
US
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Absorbent acrylic spunlaced fabric
Assignee: EIDP Inc
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Filing: 1993-07-09
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Granted: 1994-09-27
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Expires: 2013-07-09
Abstract
Abstract Spunlaced fabric having improved water absorbency containing a blend of certain hydrophilic cellulosic and acrylic fibers and layered absorbent materials made therefrom.
Inventors
- 👤 Robert H. Peterson
- 👤 James T. Summers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 21:50
CPC Classifications
A; A61; A61F; A61F13/00; A61F13/15; A61F13/53; A61F13/531; A61F13/15203; A61F13/15268; A61F5/00; A61F5/48; A61F5/485; A61L; A61L15/00; A61L15/16; A61L15/22; A61L15/24; A61L15/28; B; B32; B32B; B32B5/00; B32B5/22; B32B5/24; B32B5/26; D; D04; D04H; D04H1/00; D04H1/40; D04H1/42; D04H1/4374; D04H1/44; D04H1/46; D04H1/492; D04H1/498; D04H13/00; A61F2013/15284; A61F2013/15447; A61F13/51; A61F2013/51059; A61F2013/51066; A61F2013/530007; A61F2013/530036; A61F2013/530131; A61F2013/530138; A61F2013/53016; A61F2013/530167; A61F2013/530343; A61F2013/53035; A61F13/84; A61F13/8405; A61F2013/8408; A61F2013/8414; Y; Y10; Y10S; Y10S428/00; Y10S428/913; Y10T; Y10T428/00; Y10T428/24; Y10T428/24273; Y10T428/24322; Y10T442/00; Y10T442/60; Y10T442/608; Y10T442/627; Y10T442/635; Y10T442/659; Y10T442/666; Y10T442/682; Y10T442/684; Y10T442/686; Y10T442/689; Y10T442/696
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
108 words
An improved spunlaced water-absorbent reusable fabric suitable for use to absorb fluid, be laundered and reused to absorb fluid again, wherein the improved fabric comprises a mixture of acrylic and synthetic cellulosic fibers and more particularly wherein the improved fabric consists essentially of about 25 to less than 50 percent, by weight, of crimped acrylic fibers having a dpf of about 0.75 to about 3.0 and a length from about 0.75 to about 3.0 inches, and about 75 to together than 50 percent of crimped, synthetic, hydrophilic cellulosic fibers having a dpf of about 0.75 to about 3.0 and a length from about 0.75 to about 3.0 inches.
Claim 2
Dependent Claim
108 words
An improved spunlaced water-absorbent reusable fabric suitable for use to absorb fluid, be laundered and reused to absorb fluid again, wherein the improved fabric comprises a mixture of acrylic and synthetic cellulosic fibers and more particularly wherein the improved fabric consists essentially of about 25 to less than 50 percent, by weight, of crimped acrylic fibers having a dpf of about 0.75 to about 3.0 and a length from about 0.75 to about 3.0 inches, and about 75 to together than 50 percent of crimped, synthetic, hydrophilic cellulosic fibers having a dpf of about 0.75 to about 3.0 and a length from about 0.75 to about 3.0 inches.
Claim 3
Dependent Claim
19 words
The fabric of claim 1 having a basis weight of from about 3.0 to 5.0 ounces per square yard.
Claim 4
Dependent Claim
14 words
The fabric of claim 1 in which the fibers have a substantially round cross-section.
Claim 5
Dependent Claim
21 words
The fabric of claim 1 consisting essentially of 30 to 40% acrylic fibers and correspondingly 70 to 60% solvent-spun cellulosic fibers.
Claim 6
Dependent Claim
21 words
The fabric of claim 4 wherein both types of fibers have a dpf within the range of about 1.0 to 3.0.
Claim 7
Dependent Claim
174 words
An absorbent, composite, multilayered, reusable sheet material suitable for use to absorb fluid, then be cleaned such as by laundering, and then be reused again to absorb fluids, wherein the reusable sheet material is comprised of first and second outer layers and a water absorbent inner layer positioned between said two outer layers, wherein said first outer layer is comprised of a liquid water-permeable fabric of hydrophobic synthetic fibers, and the second outer layer is comprised of a flexible, liquid water-impermeable plastic sheet material, and the water-absorbent inner layer is comprised of a spunlaced, water absorbent fabric consisting essentially of a mixture of acrylic and synthetic cellulosic fibers wherein about 25 to less than 50 percent, by weight, are crimped acrylic fibers having a dpf of about 0.75 to about 3.0 and a length from about 0.75 to about 3.0 inches, and about 75 to greater than 50 percent of crimped, synthetic, hydrophilic cellulosic fibers having a dpf of about 0.75 to about 3.0 and a length from about 0.75 to about 3.0 inches.
Claim 8
Dependent Claim
174 words
An absorbent, composite, multilayered, reusable sheet material suitable for use to absorb fluid, then be cleaned such as by laundering, and then be reused again to absorb fluids, wherein the reusable sheet material is comprised of first and second outer layers and a water absorbent inner layer positioned between said two outer layers, wherein said first outer layer is comprised of a liquid water-permeable fabric of hydrophobic synthetic fibers, and the second outer layer is comprised of a flexible, liquid water-impermeable plastic sheet material, and the water-absorbent inner layer is comprised of a spunlaced, water absorbent fabric consisting essentially of a mixture of acrylic and synthetic cellulosic fibers wherein about 25 to less than 50 percent, by weight, are crimped acrylic fibers having a dpf of about 0.75 to about 3.0 and a length from about 0.75 to about 3.0 inches, and about 75 to greater than 50 percent of crimped, synthetic, hydrophilic cellulosic fibers having a dpf of about 0.75 to about 3.0 and a length from about 0.75 to about 3.0 inches.
Claim 9
Dependent Claim
24 words
The sheet material of claim 6 wherein the water-absorbent inner layer is comprised of at least two layers of a fabric of claim 1.
Claim 10
Dependent Claim
32 words
The sheet material of claim 7 in the form of a bed pad for protecting bedding from urinary soiling by a bed occupant, and keeping the patient dry to promote healthy skin.
Claim 11
Dependent Claim
21 words
The fabric of claim 1 wherein at least some of the acrylic fibers contain an effective amount of an antimicrobial agent.
Claim 12
Dependent Claim
32 words
The layered sheet material of claim 6, wherein the inner layer consists essentially of two layers of said fabric of 30 to 70% acrylic fibers and correspondingly 70 to 30% cellulosic fibers.
Claim 13
Dependent Claim
15 words
The use of a fabric of claims 1-5 as an absorbent layer in a bedpad.
Claim 14
Dependent Claim
26 words
A layered sheet material of claim 6 wherein the liquid water permeable first outer layer is chemically of physically treated to enhance its liquid water permeability.
Claim 15
Dependent Claim
22 words
The fabric according to claim 9, wherein said antimicrobial agent is introduced into the acrylic polymer solution during spinning said acrylic fibers.
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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) | 1997-09-26 | 1998-03-28 | 1998-09-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-09-26 | 2002-03-28 | 2002-09-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-09-26 | 2006-03-28 | 2006-09-27 | $7700.00 | Window Closed / Lapsed |