US3563243A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Absorbent pad
Assignee: Johnson and Johnson
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Filing: 1968-01-19
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Granted: 1971-02-16
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Expires: 1988-01-19
Abstract
Abstract Absorbent pads, such as diapers, underpads and the like are made in which a hydrophilic foam sheet formed of hydrophilic polymer is contained between a facing and backing and acts as the primary absorbent in the product. The edges of the hydrophilic foam sheet are completely contained within the peripheral edges of the absorbent pad and secured against lateral extension, when wet. In the preferred structure crepe cellulose tissue is placed in contact with a surface of the hydrophilic foam sheet with the creping of the tissue, particularly where the absorbent pad is for use as a diaper, running lengthwise of the diaper.
Inventors
- 👤 Julius A Lindquist
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 00:20
CPC Classifications
A; A61; A61F; A61F13/00; A61F13/15; A61L; A61L15/00; A61L15/16; A61L15/42; A61L15/425; A61F13/53; A61F13/534; A61F13/537; A61F13/51; A61F13/514; A61F13/51401; A61F2013/51409; A61F2013/530802; A61F2013/53445; A61F13/53708; A61F2013/53721
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
78 words
An absorbent pad comprising a flexible moisture permeable facing, a flexible backing and hydrophilic polymer foam sheet contained between said facing and said backing, said hydrophilic polymer foam sheet being enclosed around its edges to prevent lateral extension beyond the edges of said pad when wet, and a creped sheet of cellulosic fibers in contact with at least one surface of said hydrophilic polymer foam with the direction of crepe running in the lengthwise direction of said pad.
Claim 2
Dependent Claim
99 words
An absorbent pad comprising a flexible moisture permeable facing, a flexible backing and hydrophilic polymer foam sheet contained between said facing and said backing, said hydrophilic polymer foam sheet being enclosed around its edges to prevent lateral extension beyond the edges of said pad when wet, and a creped sheet of cellulosic fibers in contact with at least one surface of said hydrophilic polymer foam with the direction of crepe running in the lengthwise direction of said pad, there being a crepe sheet of cellulosic fibers on the surface of said hydrophilic polymer foam sheet nearest to said facing.
Claim 3
Dependent Claim
134 words
An absorbent pad comprising a flexible moisture permeable facing, a flexible backing and hydrophilic polymer foam sheet contained between said facing and said backing, said hydrophilic polymer foam sheet being enclosed around its edges to prevent lateral extension beyond the edges of said pad when wet, and a creped sheet of cellulosic fibers in contact with at least one surface of said hydrophilic polymer foam with the direction of crepe running in the lengthwise direction of said pad, there being a crepe sheet of cellulosic fibers between the facing and said hydrophilic polymer foam sheet and between the backing and said hydrophilic polymer foam sheet with the direction of crepe in said crepe sheet adjacent said facing being substantially at right angles to the direction of crepe in said crepe sheet adjacent said backing.
Claim 4
Dependent Claim
92 words
An absorbent pad comprising a flexible moisture permeable facing, a flexible backing and hydrophilic polymer foam sheet contained between said facing and said backing, said hydrophilic polymer foam sheet being enclosed around its edges to prevent lateral extension beyond the edges of said pad when wet, and a creped sheet of cellulosic fibers in contact with at least one surface of said hydrophilic polymer foam with the direction of crepe running in the lengthwise direction of said pad, said crepe sheet of cellulosic fibers being positioned between sheets of said hydrophilic foam.
Claim 5
Dependent Claim
88 words
An absorbent pad comprising a flexible moisture permeable facing, a flexible backing and hydrophilic polymer foam sheet contained between said facing and said backing, said hydrophilic polymer foam sheet being enclosed around its edges to prevent lateral extension beyond the edges of said pad when wet, said hydrophilic foam sheet being formed of a plurality of sheets of hydrophilic polymer foam, at least one of said sheets of hydrophilic polymer foam having a softness in the dry state less than the softness of said other hydrophilic polymer foam.
Claim 6
Dependent Claim
108 words
An absorbent pad comprising a flexible moisture permeable facing, a flexible backing and hydrophilic polymer foam sheet contained between said facing and said backing, said hydrophilic polymer foam sheet being enclosed around its edges to prevent lateral extension beyond the edges of said pad When wet, said hydrophilic foam sheet being formed of a plurality of sheets of hydrophilic polymer foam, at least one of said sheets of hydrophilic polymer foam having a softness in the dry state less than the softness of said other hydrophilic polymer foam, said sheet of hydrophilic polymer foam of lesser softness being positioned between sheets of hydrophilic polymer foam of greater softness.
Claim 7
Dependent Claim
64 words
An absorbent pad comprising a flexible moisture permeable facing, a flexible backing and hydrophilic polymer foam sheet contained between said facing and said backing, said hydrophilic polymer foam sheet being enclosed around its edges to prevent lateral extension beyond the edges of said pad when wet, and a sheet of cellulosic fibers in contact with at least one surface of said hydrophilic polymer foam.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-02-15 | 1974-08-17 | 1975-02-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-15 | 1978-08-17 | 1979-02-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-15 | 1982-08-17 | 1983-02-16 | $7700.00 | Window Closed / Lapsed |