US4820294A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apertured film facing and method of making the same
Assignee: JPMorgan Chase Bank NA
•
Filing: 1988-04-04
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Granted: 1989-04-11
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Expires: 2008-04-04
Abstract
Abstract An apertured plastic film facing material and method for making the same, together with an improved absorbent product formed therefrom, wherein the edge of the apertures is coated with a hydrophilic material.
Inventors
- 👤 Ronald R. Morris
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 12:54
CPC Classifications
A; A61; A61F; A61F13/00; A61F13/15; A61F13/51; A61F13/511; A61F13/512; A61F13/513; A61F13/51305; A61F13/15577; A61F2013/15821; A61F2013/51059; A61F2013/51061; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24273; Y10T428/24322; Y10T428/24331
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
75 words
An improved disposable absorbent article comprising: an absorbent core means for absorbing liquid, said absorbent core means having a first and a second opposed face; a liquid impermeable backsheet overlaying said first opposed face of said absorbent core; and a liquid permeable topsheet overlaying said opposed face of said absorbent core means, said topsheet being a hydrophobic film having a multiplicity of apertures therethrough, the edge of said apertures being coated with a hydrophilic material.
Claim 2
Dependent Claim
75 words
An improved disposable absorbent article comprising: an absorbent core means for absorbing liquid, said absorbent core means having a first and a second opposed face; a liquid impermeable backsheet overlaying said first opposed face of said absorbent core; and a liquid permeable topsheet overlaying said opposed face of said absorbent core means, said topsheet being a hydrophobic film having a multiplicity of apertures therethrough, the edge of said apertures being coated with a hydrophilic material.
Claim 3
Dependent Claim
28 words
The disposable absorbent product of claim 1 wherein the distance between the apertures of the top sheets is greater than about 20% of the diameter of the apertures.
Claim 4
Dependent Claim
20 words
The disposable absorbent product of claim 2 wherein said apertures have an equivalent hydraulic diameter of 0.025 inches or more.
Claim 5
Dependent Claim
19 words
The disposable absorbent product of claim 1 wherein said topsheet has a thickness of about 0.5 to 1.5 mils.
Claim 6
Dependent Claim
27 words
The disposable absorbent product of claim 1 wherein the distance between apertures is equal to or greater than 20% of the equivalent hydraulic diameter of the apertures.
Claim 7
Dependent Claim
19 words
The disposable absorbent product of claim 1 wherein the hydrophobic film is a 1 mil, low density polyethylene film.
Claim 8
Dependent Claim
11 words
The disposable absorbent product of claim 1 comprising a sanitary napkin.
Claim 9
Dependent Claim
10 words
The disposable absorbent product of claim 1 comprising a diaper.
References Cited (Backward Citations)
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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) | 1992-04-10 | 1992-10-10 | 1993-04-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-04-10 | 1996-10-10 | 1997-04-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-04-10 | 2000-10-10 | 2001-04-11 | $7700.00 | Window Closed / Lapsed |