Patent US4657538A successfully refreshed from Google Patents.
US4657538A
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Panty liner with flow retarding layer
Assignee: Personal Products Co
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Filing: 1985-07-29
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Granted: 1987-04-14
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Expires: 2005-07-29
Abstract
Abstract A product for absorbing body fluids intended to be worn in the crotch portion of the undergarment is provided. The product includes a first absorbent layer at the side nearest the body and a second absorbent at the side facing the garment. The layers have therebetween liquid flow retarding means to retard liquid from passing from one absorbent layer to the other. The liquid retarding means comprise one or more plies of a web of hydrophobic fiber which web has a rising column strike through value of at least 10 inches of water and an air permeability of at least 20 cubic feet per foot squared per minute.
Inventors
- 👤 Patricia E. Becker
- 👤 Kenneth J. Molee
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 13:36
CPC Classifications
A; A61; A61F; A61F13/00; A61F13/15; A61F13/53; A61F13/534; A61F13/537; A61F13/53708; A61F13/53717; A61F13/51; A61F13/511; A61F13/513; A61F13/51394; A61F13/5376; A61L; A61L15/00; A61L15/16; A61L15/42; A61F13/56; A61F13/58; A61F13/45; A61F13/47; A61F2013/4708; A61F2013/51377; A61F13/514; A61F13/51401; A61F2013/51441; A61F2013/51443; A61F2013/53445; A61F2013/53721; A61F2013/583
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
90 words
A product for absorbing body fluids comprising a body side absorbent layer, a garment side absorbent layer and having therebetween a liquid for retarding means for retarding the flow of liquid from passing from said body side absorbent layer to said garment side absorbent layer; said liquid flow retarding means comprising one or more plies of a web of hydrophobic fibers, said means having a Rising Column Strike Through Value of at least 10 inches of water and an air permeability of at least 20 ft 3 /ft 2 --min.
Claim 2
Dependent Claim
90 words
A product for absorbing body fluids comprising a body side absorbent layer, a garment side absorbent layer and having therebetween a liquid for retarding means for retarding the flow of liquid from passing from said body side absorbent layer to said garment side absorbent layer; said liquid flow retarding means comprising one or more plies of a web of hydrophobic fibers, said means having a Rising Column Strike Through Value of at least 10 inches of water and an air permeability of at least 20 ft 3 /ft 2 --min.
Claim 3
Dependent Claim
22 words
The product of claim 1 wherein said means has a Rising Column Strike Through Value of at least 12 inches of water.
Claim 4
Dependent Claim
21 words
The product of claim 1 wherein said means has an air permeability of at least 40 ft 3 /ft 2 /min.
Claim 5
Dependent Claim
16 words
The product of claim 1 wherein said means exhibits a contact angle of greater than 50°.
Claim 6
Dependent Claim
16 words
The product of claim 1 wherein said means comprise a web of synthetic polymeric fusion-bonded fibers.
Claim 7
Dependent Claim
11 words
The product of claim 5 wherein said means comprises polypropylene fibers.
Claim 8
Dependent Claim
15 words
The product of claim 1 wherein said means comprise hydrophilic fibers treated to be hydrophobic.
Claim 9
Dependent Claim
12 words
The product of claim 7 wherein said means comprise treated cellulosic fibers.
Claim 10
Dependent Claim
15 words
The product of claim 8 wherein said means comprise tissue treated with repellant treating agent.
Claim 11
Dependent Claim
108 words
A panty liner to be worn in the crotch portion of an undergarment comprising: a central core having a body facing side and a garment facing side; said central core having a body side absorbent layer, a garment side absorbent layer and a liquid flow retarding means therebetween; said liquid flow retarding means comprising one or more plies of a web of hydrophobic fibers, said means having a Rising Column Strike Through Value of at least 10 inches of water and an air permeability of at least 20 ft 3 /ft 2 /min; the garment facing side of said core having a barrier layer for protecting said undergarment.
Claim 12
Dependent Claim
108 words
A panty liner to be worn in the crotch portion of an undergarment comprising: a central core having a body facing side and a garment facing side; said central core having a body side absorbent layer, a garment side absorbent layer and a liquid flow retarding means therebetween; said liquid flow retarding means comprising one or more plies of a web of hydrophobic fibers, said means having a Rising Column Strike Through Value of at least 10 inches of water and an air permeability of at least 20 ft 3 /ft 2 /min; the garment facing side of said core having a barrier layer for protecting said undergarment.
Claim 13
Dependent Claim
46 words
The panty liner of claim 10 wherein said barrier layer comprises at least one ply of vaper permeable, liquid repellent material said ply having a repellency of at least 3.0 cm. of water and an air permeability of at least 20 ft 3 /ft 2 /min.
References Cited (Backward Citations)
US4518451A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-04-13 | 1990-10-13 | 1991-04-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-04-13 | 1994-10-13 | 1995-04-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-04-13 | 1998-10-13 | 1999-04-14 | $7700.00 | Window Closed / Lapsed |