US3595235A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multilayer absorbent pad
Assignee: Georgia-Pacific LLC
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Filing: 1969-05-16
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Granted: 1971-07-27
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Expires: 1989-05-16
Abstract
Abstract An absorbent pad, useful as a diaper, sanitary napkin, or medical dressing, which comprises two superposed liquid-absorbent layers and a liquid-resistant layer disposed between the absorbent layers. The facing surfaces of the absorbent layers have different areas and the surfaces of the resistant layer facing the absorbent layers each have less area than the absorbent layer facing surface of greater area so that liquid flowing into and through the absorbent layer having the facing surface of lesser area and contacting the resistant layer will flow about the edges of the resistant layer into the absorbent layer having the facing surface of greater area.
Inventors
- 👤 Paul W Jespersen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 15:52
CPC Classifications
A; A61; A61F; A61F13/00; A61F13/15; A61F13/53; A61F13/534; A61F13/535; A61F13/01; A61F13/01008; A61F13/537; A61F13/53704; A61F13/53708; A61F13/53743; A61L; A61L15/00; A61L15/16; A61L15/42; A61L15/52; A61F13/15203; A61F13/15211; A61F2013/00361; A61F2013/00727; A61F2013/00731; A61F2013/00744; A61F13/51; A61F13/514; A61F13/51401; A61F2013/51409; A61F2013/51441; A61F2013/51443; A61F2013/530131; A61F2013/530481; A61F2013/53445; A61F2013/53721; A61F2013/53765; A61F2013/53782
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
34 words
An absorbent pad as defined in claim 1, wherein the surfaces of said resistant layer facing said absorbent layers each have approximately the same area and dimensions as said first absorbent layer facing surface.
Claim 2
Dependent Claim
21 words
An absorbent pad as defined in claim 1, wherein said first and second absorbent layers comprise nonwoven sheets of liquid-absorbent material.
Claim 3
Dependent Claim
58 words
An absorbent pad as defined in claim 3, wherein said liquid-absorbent material includes particles of an organic noncellulosic substance selected from the group consisting of blood albumin, egg albumin, starches, pectin, algin, karaya, tragacanth and guar gums, natural and synthetic gums of polysaccharide character, chemically modified starches, and chemically modified natural and synthetic gums of a polysaccharide character.
Claim 4
Dependent Claim
18 words
An absorbent pad as defined in claim 3, wherein said liquid-absorbent material includes fibers of a cellulosic substance.
Claim 5
Dependent Claim
23 words
An absorbent pad as defined in claim 1, wherein said sheet comprises a nonwoven sheet of cellulosic fibers having a liquid-repellant coating thereon.
Claim 6
Dependent Claim
18 words
An absorbent pad as defined in claim 1, wherein said sheet comprises a sheet Of perforated plastic film.
Claim 7
Dependent Claim
23 words
An absorbent pad as defined in claim 1, wherein said pad further includes a cover disposed about said first and second absorbent layers.
Claim 8
Dependent Claim
28 words
An absorbent pad as defined in claim 8, wherein the portion of said cover disposed adjacent said first absorbent layer comprises a liquid-pervious, nonwoven sheet of nonwettable material.
Claim 9
Dependent Claim
15 words
An absorbent pad as defined in claim 9, wherein said nonwettable material comprises rayon fibers.
Claim 10
Dependent Claim
144 words
An absorbent pad comprising: first and second superposed liquid-absorbent layers, the surface of said first absorbent layer facing said second absorbent layer having less area than the surface of said second absorbent layer facing said first absorbent layer; a liquid-resistant layer disposed between said absorbent layers, the surfaces of said resistant layer facing said absorbent layers each having less area than said second absorbent layer facing surface, said pad being adapted to be worn with said first absorbent layer adjacent the body of a user so that liquid flowing into and through the first absorbent layer and contacting the resistant layer will flow about the edges of the resistant layer into the second absorbent layer; and a cover disposed about said first and second absorbent layers, the portion of said cover disposed adjacent said second absorbent layer comprising an air-pervious, substantially liquid-impervious, flexible sheet.
Claim 11
Dependent Claim
23 words
An absorbent pad as defined in claim 11, wherein said sheet comprises a nonwoven sheet of cellulosic fibers having a liquid-repellant coating thereon.
Claim 12
Dependent Claim
18 words
An absorbent pad as defined in claim 11, wherein said sheet comprises a sheet of perforated plastic film.
Claim 13
Dependent Claim
188 words
An absorbent pad comprising: first and second superposed liquid-absorbent layers, the surface of said first absorbent layer facing said second absorbent layer having less area than the surface of said second absorbent layer facing said first absorbent layer; a liquid-resistant layer disposed between said absorbent layers, the surfaces of said resistant layer facing said absorbent layers each having less area than said second absorbent layer facing surface, said pad being adapted to be worn with said first absorbent layer adjacent the body of a user so that liquid flowing into and through the first absorbent layer and contacting the resistant layer will flow about the edges of the resistant layer into the second absorbent layer; a cover disposed about said first and second absorbent layers; and a liquid-dispersant layer disposed between said second absorbent and resistant layers, the surfaces of said dispersant layer facing said second absorbent and resistant layers each having approximately the same area and dimensions as said second absorbent layer facing surface so that the dispersant layer will distribute liquid flowing about the edges of the resistant layer across said second absorbent layer facing surface.
Claim 14
Dependent Claim
83 words
An absorbent pad as defined in claim 14, wherein said pad further includes a second liquid-dispersant layer disposed between said first absorbent layer and said cover, the surfaces of said second dispersant layer facing said first absorbent layer and said cover having approximately the same area and dimensions as the surface of said first absorbent layer facing said cover so that the second dispersant layer will distribute liquid flowing through said cover across said surface of the first absorbent layer facing the cover.
Claim 15
Dependent Claim
38 words
An absorbent pad as defined in claim 15, wherein said first-mentioned and second dispersant layers comprise nonwoven sheets of material having a substantially higher capillarity than the material from which said first and second absorbent layers are comprised.
Claim 16
Dependent Claim
18 words
An absorbent pad as defined in claim 16, wherein said material of substantially higher capillarity comprises cellulosic fibers.
Claim 17
Dependent Claim
25 words
An absorbent pad as defined in claim 15, wherein said first and second absorbent, resistant, and first-mentioned and seconD dispersant layers are disintegratable in water.
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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) | 1974-07-26 | 1975-01-25 | 1975-07-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-07-26 | 1979-01-25 | 1979-07-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-07-26 | 1983-01-25 | 1983-07-27 | $7700.00 | Window Closed / Lapsed |