Patent US4496358A successfully refreshed from Google Patents.
US4496358A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Diaper having variable density absorbent pad
Assignee: Colgate Palmolive Co
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Filing: 1982-12-13
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Granted: 1985-01-29
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Expires: 2002-12-13
Abstract
Abstract A disposable diaper comprising a top sheet, an absorbent pad assembly and a water impervious backing sheet. The absorbent pad assembly includes one or more absorbent pads at least one of which is treated with a water spray to vary the density thereof increasingly from top to bottom. The absorbent pad assembly may have a lower wadding sheet integrally stabilized to the pad treated with the water spray.
Inventors
- 👤 Hamzeh Karami
- 👤 Myriam Delvaux
- 👤 Terence Cooper
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 22:44
CPC Classifications
A; A61; A61F; A61F13/00; A61F13/15; A61F13/53; A61F13/534; A61F13/15203; A61F2013/15284; A61F2013/15422; A61F2013/1543; A61F2013/53463
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
93 words
A disposable diaper comprising, in order, a top sheet, an absorbent pad assembly including a fist absorbent pad, a second absorbent pad separate from said first pad and below said first pad, wadding means including an upper wadding layer above said first pad, and a lower wadding layer below said second pad, said wadding means enveloping both said pads, and a water impervious backing sheet, and water spray means integrally stabilizing said lower wadding layer to said second pad while varying the density of said second pad increasingly away from said top sheet.
Claim 2
Dependent Claim
93 words
A disposable diaper comprising, in order, a top sheet, an absorbent pad assembly including a fist absorbent pad, a second absorbent pad separate from said first pad and below said first pad, wadding means including an upper wadding layer above said first pad, and a lower wadding layer below said second pad, said wadding means enveloping both said pads, and a water impervious backing sheet, and water spray means integrally stabilizing said lower wadding layer to said second pad while varying the density of said second pad increasingly away from said top sheet.
Claim 3
Dependent Claim
35 words
A disposable diaper according to claim 1, wherein said water spray means is also between said first and second absorbent pads to also vary the density of said first pad while stabilizing said pads together.
Claim 4
Dependent Claim
22 words
A disposable diaper according to claim 1, wherein said water spray means is applied mainly in the center of said second pad.
Claim 5
Dependent Claim
23 words
A disposable diaper according to claim 1, wherein said top sheet is of hydrophobic material, said backing sheet being an imperforate plastic film.
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) | 1988-01-29 | 1988-07-30 | 1989-01-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-01-29 | 1992-07-30 | 1993-01-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-01-29 | 1996-07-30 | 1997-01-29 | $7700.00 | Window Closed / Lapsed |