Patent US4411660A successfully refreshed from Google Patents.
US4411660A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Absorbent product and articles made therefrom
Assignee: National Aeronautics and Space Administration
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Filing: 1982-04-14
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Granted: 1983-10-25
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Expires: 2002-04-14
Abstract
Abstract A multi-layer absorbent product (10) for use in contact with the skin to absorb fluids, the product having a water pervious facing layer (12) for contacting the skin, a first fibrous wicking layer (14) overlaying the water pervious layer, a first container section (17) defined by inner and outer layers (16, 18) of a water pervious wicking material between which is disposed a first absorbent mass (20), a second container section (20) defined by inner and outer layers (22, 24) of a water pervious wicking material between what is disposed a second absorbent mass (28), and a liquid impermeable/gas permeable layer (30) overlaying the second fibrous wicking layer.
Inventors
- 👤 Frederic S. Dawn
- 👤 James V. Correale
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 15:36
CPC Classifications
A; A61; A61F; A61F13/00; A61F13/15; A61F13/53; A61F13/534; A61F13/45; A61F13/49; A61F13/496; A61F13/537; A61F13/53708; A61F13/53713; A61F5/00; A61F5/44; A61F5/4401; A61F2013/49068; A61F2013/49076; A61F13/51; A61F2013/51002; A61F2013/51038; A61F2013/51042; A61F2013/530481; A61F2013/53445; A61F2013/53721
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
251 words
A fluid absorbent undergarment such as a panty and the like having a front, rear and opposite sides cooperating to define a lower torso garment having a waist opening, said undergarment including an outer covering, said inner core being generally encapsulated in said outer covering and extending generally throughout said undergarment, said inner core comprising a multi-layered, absorbent product comprising: a. a water pervious facing layer for contacting the skin; b. a first fibrous, wicking layer contiguous said water pervious layer; c. a first container section having an inner layer and an outer layer forming a first absorbent container therebetween, said container section being comprised of a water pervious material, said inner layer being contiguous said first fibrous, wicking layer; d. a first absorbent mass disposed in said first absorbent container, said first absorbent mass comprising a super absorbent high molecular weight acrylic polymer containing hydrophilic carboxylate groups said polymer forming a gel upon contact with an aqueous medium; e. a second container section having an inner layer and said outer layer container therebetween, said second container section being comprised of a water pervious material, said inner layer of said second container section being contiguous said outer layer of said first container section; f. a second absorbent mass disposed in said second absorbent container, said second absorbent mass comprising a hydrolyzed starch-acrylonitrile graft copolymer, said copolymer forming a gel upon content with an aqueous medium; and g. a liquid impermeable/gas permeable layer contiguous said outer layer of said second container section.
Claim 2
Dependent Claim
251 words
A fluid absorbent undergarment such as a panty and the like having a front, rear and opposite sides cooperating to define a lower torso garment having a waist opening, said undergarment including an outer covering, said inner core being generally encapsulated in said outer covering and extending generally throughout said undergarment, said inner core comprising a multi-layered, absorbent product comprising: a. a water pervious facing layer for contacting the skin; b. a first fibrous, wicking layer contiguous said water pervious layer; c. a first container section having an inner layer and an outer layer forming a first absorbent container therebetween, said container section being comprised of a water pervious material, said inner layer being contiguous said first fibrous, wicking layer; d. a first absorbent mass disposed in said first absorbent container, said first absorbent mass comprising a super absorbent high molecular weight acrylic polymer containing hydrophilic carboxylate groups said polymer forming a gel upon contact with an aqueous medium; e. a second container section having an inner layer and said outer layer container therebetween, said second container section being comprised of a water pervious material, said inner layer of said second container section being contiguous said outer layer of said first container section; f. a second absorbent mass disposed in said second absorbent container, said second absorbent mass comprising a hydrolyzed starch-acrylonitrile graft copolymer, said copolymer forming a gel upon content with an aqueous medium; and g. a liquid impermeable/gas permeable layer contiguous said outer layer of said second container section.
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) | 1986-10-24 | 1987-04-25 | 1987-10-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-10-24 | 1991-04-25 | 1991-10-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-10-24 | 1995-04-25 | 1995-10-25 | $7700.00 | Window Closed / Lapsed |