US4475911A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Absorbent devices
Assignee: Procter and Gamble Co
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Filing: 1981-04-13
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Granted: 1984-10-09
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Expires: 2001-04-13
Abstract
Abstract Absorbent devices, such as catamenial tampons and catamenial pads. The devices comprise an unbonded array of non-absorbent, hydrophillic, resilient, moisture insensitive fibers contained within a porous overwrap. When the devices are intended to be presented in the compressed state, the compressed density of the mass of fibers should be less than about 0.3 grams per cubic centimeter. The devices can contain ancillary absorbent material.
Inventors
- 👤 Dale A. Gellert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:22
CPC Classifications
A; A61; A61F; A61F13/00; A61F13/15; A61F13/20; A61F13/2022; A61F13/2037; Y; Y10; Y10S; Y10S604/00; Y10S604/904
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
95 words
A catamenial pad comprising an absorbent, unbonded array of fibers encased between a fluid pervious topsheet and a fluid impervious backsheet wherein said fibers are non-absorbent, hydrophilic, resilient, moisture insensitive, from about 0.75 to about 6 denier, from about 0.6 to about 7.6 centimeters long, and are crimped; and wherein said topsheet comprises an apertured hydrophobic film having a caliper less than about 0.075 centimeter and an open area of at least about 35% wherein less than about 25% of said apertures have an equivalent hydraulic diameter less than or equal to about 0.064 centimeter.
Claim 2
Dependent Claim
95 words
A catamenial pad comprising an absorbent, unbonded array of fibers encased between a fluid pervious topsheet and a fluid impervious backsheet wherein said fibers are non-absorbent, hydrophilic, resilient, moisture insensitive, from about 0.75 to about 6 denier, from about 0.6 to about 7.6 centimeters long, and are crimped; and wherein said topsheet comprises an apertured hydrophobic film having a caliper less than about 0.075 centimeter and an open area of at least about 35% wherein less than about 25% of said apertures have an equivalent hydraulic diameter less than or equal to about 0.064 centimeter.
Claim 3
Dependent Claim
105 words
A catamenial pad comprising an absorbent, unbonded array of fibers encased within a homogeneous outerwrap wherein said fibers are non-absorbent, hydrophilic, resilient, and moisture insensitive and wherein said outerwrap comprises a fluid impermeable film provided with a multiplicity of protuberances having a base in the plane of said outerwrap and an apex remote therefrom, wherein said apex and said base are provided with openings, wherein the maximal diameter of the opening in said apex is less than about 0.25 centimeter and the maximal diameter of the opening in said base is at least as great as said maximal diameter of the opening in said apex.
Claim 4
Dependent Claim
105 words
A catamenial pad comprising an absorbent, unbonded array of fibers encased within a homogeneous outerwrap wherein said fibers are non-absorbent, hydrophilic, resilient, and moisture insensitive and wherein said outerwrap comprises a fluid impermeable film provided with a multiplicity of protuberances having a base in the plane of said outerwrap and an apex remote therefrom, wherein said apex and said base are provided with openings, wherein the maximal diameter of the opening in said apex is less than about 0.25 centimeter and the maximal diameter of the opening in said base is at least as great as said maximal diameter of the opening in said apex.
Claim 5
Dependent Claim
29 words
The catamenial pad of claim 2 wherein said fibers are from about 0.75 to about 6 denier, are from about 0.6 to about 7.6 centimeters long, and are crimped.
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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) | 1987-10-09 | 1988-04-09 | 1988-10-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-10-09 | 1992-04-09 | 1992-10-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-10-09 | 1996-04-09 | 1996-10-09 | $7700.00 | Window Closed / Lapsed |