US3987792A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Disposable diaper having improved liquid retention
Assignee: Colgate Palmolive Co
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Filing: 1975-07-31
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Granted: 1976-10-26
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Expires: 1995-07-31
Abstract
Abstract A disposable diaper comprising in order: A water-pervious layer; A spongy, resilient and compressible hydrophobic fibrous layer; An absorbent core; and A water impervious layer, Wherein said hydrophobic fibrous layer has a density of from about 0.01gm/cc to 0.03gm/cc and comprises non-woven, hydrophobic fibers having an average length of from about 1/4 in. to 31/2 , said fibers being bonded together at at least a substantial number of their points of contact. The hydrophobic fibrous layer is pervious to fluids in the uncompressed condition; however, when compressed, as by the bodily weight of an infant clothed with the diaper, the layer becomes impervious to fluids, the compressed fibers intermeshing to form a seal or barrier.
Inventors
- 👤 John Michael Hernandez
- 👤 Karl H. Roberts
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 22:43
CPC Classifications
A; A61; A61F; A61F13/00; A61F13/15; A61F13/53; A61F13/534; A61F13/537; A61F13/53704; A61F13/51; A61F13/511; A61F13/51121; A61F13/5116; A61F13/512; A61F13/513; A61F13/51305; A61F13/51311; A61F13/15203; A61F2013/15284; A61F2013/15422; A61F2013/53791
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
103 words
A disposable diaper comprising in order: a water-pervious layer; a spongy, resilient and compressible hydrophobic fibrous layer; an absorbent core, and a water impervious layer, wherein said hydrophobic fibrous layer has a density of from about 0.01gm/cc to 0.03gm/cc and comprises non-woven, hydrophobic fibers having an average length of from about 1/4 in to 31/2 in, said fibers being bonded together at at least a substantial number of their points of contact, said hydrophobic fibrous layer in the uncompressed condition being pervious to fluids but when compressed, being substantially impervious to fluids, the compressed fibers intermeshing to form a fluid seal or barrier.
Claim 2
Dependent Claim
103 words
A disposable diaper comprising in order: a water-pervious layer; a spongy, resilient and compressible hydrophobic fibrous layer; an absorbent core, and a water impervious layer, wherein said hydrophobic fibrous layer has a density of from about 0.01gm/cc to 0.03gm/cc and comprises non-woven, hydrophobic fibers having an average length of from about 1/4 in to 31/2 in, said fibers being bonded together at at least a substantial number of their points of contact, said hydrophobic fibrous layer in the uncompressed condition being pervious to fluids but when compressed, being substantially impervious to fluids, the compressed fibers intermeshing to form a fluid seal or barrier.
Claim 3
Dependent Claim
18 words
A disposable diaper in accordance with claim 1 wherein said water pervious layer comprises non-absorbent, soft, non-woven tissue.
Claim 4
Dependent Claim
20 words
A disposable diaper in accordance with claim 2 wherein said water pervious layer is provided with a plurality of perforations.
Claim 5
Dependent Claim
28 words
A disposable diaper in accordance with claim 1 wherein said hydrophobic fibrous layer comprises resinous polyester fibers derived from the reaction product of ethylene glycol and dimethyl terephthalate.
Claim 6
Dependent Claim
26 words
A disposable diaper in accordance with claim 4 wherein said fibers are adhesively bonded together at at least a substantial number of their points of contact.
Claim 7
Dependent Claim
27 words
A disposable diaper in accordance with claim 1 wherein said hydrophobic fibrous layer has a thickness within the range of from about 3/16 in to 1/2 in.
Claim 8
Dependent Claim
22 words
A disposable diaper in accordance with claim 1 wherein said absorbent core comprises an absorbent fluff material sandwiched between opposed absorbent sheets.
Claim 9
Dependent Claim
20 words
A disposable diaper in accordance with claim 1 wherein said absorbent core comprises a plurality of plies of creped cellulose.
Claim 10
Dependent Claim
19 words
A disposable diaper in accordance with claim 1 wherein said water impervious layer comprises a resinous, filmforming polymeric material.
Claim 11
Dependent Claim
23 words
A disposable diaper in accordance with claim 9 wherein said impervious layer is selected from the group consisting of polyethylene, polypropylene and polyvinylchloride.
Claim 12
Dependent Claim
126 words
A disposable diaper comprising in order: a water pervious layer comprising a web of soft non-woven, non-absorbent material; a spongy, resilient and compressible hydrophobic fibrous layer; an absorbent core comprising a fiber fluff material sandwiched between absorbent sheets, and a water-impervious layer comprising a film-forming, resinous, polymeric material wherein said hydrophobic fibrous layer has a density of from about 0.01gm/cc to 0.03gm/cc and comprises non-woven, hydrophobic fibers having an average length of from about 1/4 in to 31/2 in, said fibers being bonded together at at least a substantial number of their points of contact, said hydrophobic fibrous layer in the compressed condition being pervious to fluids but when compressed, being substantially impervious to fluids, the compressed fibers intermeshing to form a fluid seal or barrier.
Claim 13
Dependent Claim
126 words
A disposable diaper comprising in order: a water pervious layer comprising a web of soft non-woven, non-absorbent material; a spongy, resilient and compressible hydrophobic fibrous layer; an absorbent core comprising a fiber fluff material sandwiched between absorbent sheets, and a water-impervious layer comprising a film-forming, resinous, polymeric material wherein said hydrophobic fibrous layer has a density of from about 0.01gm/cc to 0.03gm/cc and comprises non-woven, hydrophobic fibers having an average length of from about 1/4 in to 31/2 in, said fibers being bonded together at at least a substantial number of their points of contact, said hydrophobic fibrous layer in the compressed condition being pervious to fluids but when compressed, being substantially impervious to fluids, the compressed fibers intermeshing to form a fluid seal or barrier.
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) | 1979-10-26 | 1980-04-26 | 1980-10-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-10-26 | 1984-04-26 | 1984-10-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-10-26 | 1988-04-26 | 1988-10-26 | $7700.00 | Window Closed / Lapsed |